阅读说明：本技术 基于油藏条件的合理机采系统效率测算方法 (Reasonable mechanical recovery system efficiency measuring and calculating method based on oil reservoir conditions ) 是由 邴绍献 张海燕 肖武 李振泉 宋鑫 周长敬 李东玻 徐永春 吕翔慧 张金铸 于 2019-10-08 设计创作，主要内容包括：本发明提供一种基于油藏条件的合理机采系统效率测算方法,该基于油藏条件的合理机采系统效率测算方法包括：步骤1,明确基于油藏条件的机采系统效率主控因素；步骤2,测算相应油藏条件的不同液量水平、不同杆泵组合下机采系统效率；步骤3,确定相应油藏条件的不同液量水平下最高机采系统效率；步骤4,确定相应油藏条件的不同液量水平下合理机采系统效率。该基于油藏条件的合理机采系统效率测算方法不再依托每一口抽油机井的优化结果,大大提高工作效率,且提高了不同黑箱模型(不同类型油藏或不同采油管理区等)之间的可对比性；较好地满足矿场能耗管理与运行考核等不同需求。(The invention provides a reasonable mechanical recovery system efficiency measuring and calculating method based on oil reservoir conditions, which comprises the following steps: step 1, determining main control factors of the efficiency of a mechanical mining system based on oil reservoir conditions; step 2, measuring and calculating the mechanical recovery system efficiency under different liquid levels and different rod pump combinations of corresponding oil reservoir conditions; step 3, determining the highest mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions; and 4, determining the reasonable mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions. The reasonable mechanical recovery system efficiency measuring and calculating method based on the oil reservoir conditions does not rely on the optimization result of each oil pumping well, greatly improves the working efficiency, and improves the contrast among different black box models (different types of oil reservoirs or different oil recovery management areas and the like); the different requirements of mine energy consumption management, operation assessment and the like are better met.)

1. The reasonable mechanical recovery system efficiency measuring and calculating method based on the oil reservoir conditions is characterized by comprising the following steps of:

step 1, determining main control factors of the efficiency of a mechanical mining system based on oil reservoir conditions;

step 2, measuring and calculating the mechanical recovery system efficiency under different liquid levels and different rod pump combinations of corresponding oil reservoir conditions;

step 3, determining the highest mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions;

and 4, determining the reasonable mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions.

2. The reasonable mechanical recovery system efficiency measuring and calculating method based on the oil reservoir conditions is characterized in that in the step 1, index parameters of reservoir physical properties, fluid physical properties, stratum energy and development stages representing oil reservoir characteristics are collected and sorted; and screening out main control factors influencing the efficiency of the mechanical mining system from a plurality of oil reservoir characteristic parameters by adopting a grey correlation analysis method.

3. The method for calculating the efficiency of the reasonable mechanical recovery system based on the oil reservoir conditions as claimed in claim 1, wherein in step 2, under the condition that the actual parameter value of the main control factor of the calculation object is known, the mechanical recovery system efficiency corresponding to different rod pump combinations and working systems is adopted under the condition of calculating different liquid levels by combining the dynamic analysis of oil well inflow in the oil reservoir engineering.

4. The method for calculating the efficiency of the reasonable mechanical recovery system based on the oil reservoir conditions as claimed in claim 1, wherein in step 3, the highest system efficiency corresponding to each liquid level is screened out according to the mechanical recovery system efficiency under different liquid levels and different rod pump combinations obtained in step 2.

5. The reasonable mechanical recovery system efficiency measurement and calculation method based on the oil reservoir conditions is characterized in that in the step 4, correction coefficients are introduced by considering the influences of elastic expansion and contraction of a pipe column, gas or fullness and leakage loss; and (4) multiplying the highest system efficiency obtained in the step (3) by a correction coefficient to obtain reasonable system efficiency under different liquid levels.

Technical Field

The invention relates to the technical field of oil field development, in particular to a reasonable mechanical recovery system efficiency measuring and calculating method based on oil reservoir conditions.

Background

In the field of oil extraction engineering, mechanical oil extraction is dominant worldwide, and the proportion of energy consumption in the crude oil production process is also the largest. The efficiency of the mechanical recovery system is improved, and the method has important significance for energy conservation and consumption reduction of oil field enterprises.

The reasonable mechanical mining system efficiency is measured and calculated, the potential optimization space is determined, and the method is an important way for determining mechanical mining equipment and a working system and realizing energy conservation and consumption reduction in a mine field. At present, the main method for improving the efficiency of a mechanical production system is to take each oil pumping well as an optimization object. According to the production horizon characteristics, the optimal working system of the oil pumping unit type, the pump descending depth, the stroke frequency and the like is analyzed and determined, so that the efficiency of the oil pumping well system is the highest. The method is effective and is generally applied to various oil fields.

However, for operation management, it is often necessary to quickly and accurately measure and calculate the reasonable mechanical recovery system efficiency of different oil recovery units or different types of oil reservoirs, so as to provide a basis for energy consumption index distribution or management level assessment and evaluation of the oil recovery system. The measuring and calculating object is a set of a batch of pumping wells formed according to actual needs, namely the pumping wells with similar attributes are treated as a black box model. The black box model weakens the working condition characteristics of a single pumping well, more reflects the macroscopic characteristics of a certain type of oil reservoirs, and can be better applied to transverse comparison among different types of artificially divided oil reservoirs. At the moment, the conventional measuring and calculating method based on single well optimization has the disadvantages of large workload, low working efficiency and incapability of meeting the requirements of a mine field. Therefore, a novel reasonable mechanical mining system efficiency measuring and calculating method based on oil reservoir conditions is invented, and the technical problems are solved.

Disclosure of Invention

The invention aims to provide a reasonable mechanical mining system efficiency measuring and calculating method based on oil reservoir conditions, which is suitable for measuring and calculating the efficiency of a reasonable mechanical mining system under different oil reservoir conditions in a non-thermal mining development mode, is quick and accurate, and better meets various requirements of operation management of a mine field.

The object of the invention can be achieved by the following technical measures: the reasonable mechanical recovery system efficiency measuring and calculating method based on the oil reservoir conditions comprises the following steps: step 1, determining main control factors of the efficiency of a mechanical mining system based on oil reservoir conditions; step 2, measuring and calculating the mechanical recovery system efficiency under different liquid levels and different rod pump combinations of corresponding oil reservoir conditions; step 3, determining the highest mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions; and 4, determining the reasonable mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions.

The object of the invention can also be achieved by the following technical measures:

in the step 1, collecting and organizing the index parameters of reservoir physical properties, fluid physical properties, stratum energy, development stages and the like which represent the characteristics of the oil reservoir; and screening out main control factors influencing the efficiency of the mechanical mining system from a plurality of oil reservoir characteristic parameters by adopting a grey correlation analysis method.

In step 2, under the condition that the actual parameter value of the main control factor of the measurement and calculation object is known, the mechanical recovery system efficiency corresponding to different rod pump combinations and working systems is adopted under the condition of measuring and calculating different liquid levels by combining the dynamic analysis of oil well inflow in the oil reservoir engineering.

In step 3, according to the different liquid levels and the pump-descending system efficiency of different rod pump combinations obtained in step 2, the highest system efficiency corresponding to each liquid level is screened out.

In step 4, a correction coefficient is introduced by considering the influence of elastic expansion, gas or fullness and leakage of the pipe column; and (4) multiplying the highest system efficiency obtained in the step (3) by a correction coefficient to obtain reasonable system efficiency under different liquid levels.

The reasonable mechanical mining system efficiency measuring and calculating method based on the oil reservoir conditions is suitable for measuring and calculating the reasonable mechanical mining system efficiency in a non-thermal mining development mode and under different oil reservoir conditions. And generating a plurality of rod-pumped well sets with similar attributes, namely a plurality of black box models (different types of oil reservoirs or different oil recovery management areas and the like) according to actual needs. And measuring and calculating the efficiency of the reasonable mechanical mining system by combining the macroscopic characteristics of the oil reservoir, the fluid physical property, the stratum energy condition and the like of each black box model. The method does not depend on the optimization result of each pumping well, greatly improves the working efficiency and improves the contrast between different black box models. The different requirements of mine energy consumption management, operation assessment and the like are better met.

Drawings

FIG. 1 is a flow chart of an embodiment of a method for calculating efficiency of a rational mechanical recovery system based on reservoir conditions according to the present invention;

FIG. 2 is a graph of energy consumption master control factors of the mechanical recovery system based on reservoir conditions in an embodiment of the present invention;

FIG. 3 is a graph of the efficiency of a mechanical recovery system for different combinations of rods at different fluid levels for corresponding reservoir conditions in an embodiment of the present invention;

FIG. 4 is a graph of maximum mechanical recovery system efficiency at different fluid volume levels for corresponding reservoir conditions in an embodiment of the present invention;

FIG. 5 is a graph of the efficiency of a rational mechanical recovery system at different fluid levels for corresponding reservoir conditions in an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The reasonable mechanical mining system efficiency measuring and calculating method based on the oil reservoir conditions comprises the following steps:

step 1, determining the main control factors of the efficiency of the mechanical mining system based on the oil reservoir conditions. Collecting and sorting the index parameters of reservoir physical property, fluid physical property, stratum energy, development stage and the like which represent the characteristics of the oil reservoir. And screening out main control factors influencing the efficiency of the mechanical mining system from a plurality of oil reservoir characteristic parameters by adopting correlation analysis methods such as grey correlation and the like.

And 2, measuring and calculating the mechanical recovery system efficiency under different liquid levels and different rod pump combinations of corresponding oil reservoir conditions. Under the condition that the actual parameter value of the main control factor of the measurement and calculation object is known, the mechanical recovery system efficiency corresponding to different rod pump combinations and working systems is adopted under the condition of measuring and calculating different liquid levels by combining oil well inflow dynamic analysis and the like in an oil reservoir project.

And 3, determining the highest mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions. And (4) screening out the highest system efficiency corresponding to each liquid level according to the different liquid levels and the pump combination lower mechanical recovery system efficiencies of different rod pumps obtained in the step (2).

And 4, determining the reasonable mechanical recovery system efficiency under different liquid volume levels of corresponding oil reservoir conditions. The influence of elastic expansion, gas or fullness, leakage and the like of the pipe pole column is considered, and a correction coefficient is introduced. And (4) multiplying the highest system efficiency obtained in the step (3) by a correction coefficient to obtain reasonable system efficiency under different liquid levels.

In an embodiment of the invention, as shown in fig. 1, fig. 1 is a flowchart of a method for calculating the efficiency of a rational mechanical recovery system based on oil reservoir conditions according to the invention.

In step 101, collecting and organizing the reservoir physical property, fluid physical property, stratum energy, development stage and other index parameters representing the oil reservoir characteristics. Such as oil bearing area, fault density, reservoir burial depth, permeability, effective thickness, formation pressure, crude oil viscosity, water content, production level, and the like. And (4) performing energy consumption correlation analysis on the lifting schemes under different combinations by adopting a grey correlation method. The results show that the influencing factors are formation coefficient (permeability multiplied by effective thickness), viscosity, formation pressure, water content and reservoir burial depth from high to low respectively, and the influencing factors are shown in figure 2.

In step 103, the permeability of a certain oil field fault oil reservoir is known to be 2000mD, the effective thickness is known to be 25m, the viscosity of the formation crude oil is 25mPa.s, the water content is 93%, and the oil reservoir burial depth is 2200 m. The mechanical recovery system efficiency under different liquid levels, different rod-column combinations and working systems is calculated by combining the dynamic analysis of the oil well inflow in the oil reservoir engineering, namely the relationship between the fluid yield and the corresponding bottom hole flowing pressure, and the like, and the figure 3 shows.

In step 105, according to the mechanical recovery system efficiencies obtained in step 103 under different liquid levels and different rod pump combinations, the highest mechanical recovery system efficiency under different liquid levels is screened out, as shown in fig. 4.

In step 107, a correction factor of 0.88 is introduced, taking into account the effects of elastic expansion and contraction of the pipe string, gas or fullness, loss, etc. And (5) multiplying the highest mechanical mining system efficiency obtained in the step (105) by a correction coefficient to obtain reasonable mechanical mining system efficiency under different liquid levels, which is shown in figure 5.

The method for measuring and calculating the efficiency of the reasonable mechanical recovery system based on the oil reservoir conditions generates a plurality of oil pumping well sets with similar attributes, namely a plurality of black box models (different types of oil reservoirs or different oil recovery management areas and the like) according to actual needs. And measuring and calculating the efficiency of the reasonable mechanical mining system by combining the macroscopic characteristics of the oil reservoir, the fluid physical property, the stratum energy condition and the like of each black box model. The reasonable mechanical recovery system efficiency measuring and calculating method based on the oil reservoir conditions does not depend on the optimization result of each oil pumping well, greatly improves the working efficiency, and improves the contrast between different black box models. The different requirements of mine energy consumption management, operation assessment and the like are better met.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.