变产-变压情况下的页岩油气生产数据分析方法

发布时间：2018-05-09 14:42

本文选题：页岩油气井 + 生产数据分析　；参考：《天然气工业》2017年11期

【摘要】：页岩油气井生产动态分析中,生产数据分析方法被广泛应用于求取渗透率、裂缝参数以及预测控制储量,该方法假定油气井生产满足定产或定压条件,然而实际情况中产量和压力却是变化的。针对变产—变压的情况,国内外学者都认为可采用物质平衡时间或线性叠加时间将生产数据进行转换后进行分析,但目前对二者如何选择并没有形成统一的观点。为此,开展了物质平衡时间和线性叠加时间两种处理方法的数值试验、理论分析对比,提出了页岩油气变产—变压情况下的时间函数选择建议。研究结果表明:(1)页岩油气变产—变压情况下的生产数据分析,可通过物质平衡时间或线性叠加时间转换,将变产—变压问题转变成定产—定压问题来处理,流程包括动态数据处理、线性流诊断、控制储量和裂缝半长计算、特征曲线分析;(2)变产—变压生产的页岩油井生产数据分析,可分别采用线性叠加时间与物质平衡时间进行处理,前者的结果更准确;(3)对于页岩气井生产数据分析,建议尽量选择线性叠加拟时间,只有在拟时间难以获取时才选择物质平衡时间。结论认为:变产—变压情况下的页岩油气生产数据分析方法为页岩油气井生产动态分析提供了技术支撑,可用于指导页岩油气井产量预测和压裂设计。
[Abstract]:In the production performance analysis of shale oil and gas wells, the production data analysis method is widely used to obtain permeability, fracture parameters and predicted controlled reserves. The method assumes that the production of oil and gas wells meets the conditions of constant production or constant pressure. In practice, however, production and pressure are variable. According to the situation of variable production and variable pressure, domestic and foreign scholars think that the material equilibrium time or linear superposition time can be used to analyze the production data after conversion, but there is no unified view on how to choose the two. For this reason, the numerical tests of material balance time and linear superposition time are carried out, and the theoretical analysis and comparison are made, and some suggestions for selecting time function in the case of shale oil and gas production and pressure variation are put forward. The results show that the analysis of production data in the case of oil and gas production and pressure variation in shale can be dealt with by means of material equilibrium time or linear superposition time conversion, and the problem of variable production-pressure change can be transformed into a constant production and constant pressure problem. The process includes dynamic data processing, linear flow diagnosis, calculation of control reserves and half length of fractures, analysis of characteristic curves and analysis of production data for shale wells with variable production and variable pressure production. The linear superposition time and the material equilibrium time can be used separately. The former results are more accurate than others. For the analysis of production data of shale gas wells, it is suggested that the linear superposition pseudo-time should be chosen as far as possible. The material equilibrium time is chosen only when the imitating time is difficult to obtain. The conclusion is that the analysis method of shale oil and gas production data under the condition of variable productivity and variable pressure provides technical support for the production performance analysis of shale oil and gas wells and can be used to guide the production prediction and fracturing design of shale oil and gas wells.
【作者单位】：中海油研究总院新能源研究中心;
【基金】：中海石油(中国)有限公司科技项目“海外页岩油气产能评价技术与方法研究”(编号:YXKY-2016-ZY-03)
【分类号】：TE332

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