气藏动态地质储量及水侵量是水驱气藏开发设计的重要参数,目前常使用气藏物质平衡法进行计算,但是运用常规物质平衡法计算水驱气藏水侵量和动态地质储量时,由于人工选取回归点、识别图版等过程会产生较大误差,常出现不同方法地质储量及水侵量计算结果不同的情况。针对以上问题,对水侵量计算物质平衡法中的差值法、图版法、视地质储量法进行分析,建立3种方法之间的约束条件,形成新的计算方法,并进行实例计算。通过实例分析了常规物质平衡法误差来源,并验证新方法,计算结果表明新方法具有较好的实用性和可靠性,可以推广运用到有水气藏动态储量及水侵量的计算。
When calculating the water influx and geological reserves of the water-drive gas reservoir by using the material balance method,large errors will occur due to artificial selection of the regression points and the identification of the chart,and of ten results in different calculation results of geological reserves and water influx by different methods. In view of the above problems,this paper analyzes the difference method,chart method and apparent geologic reserves method in the material balance method of water influx calculation,establishes the constraint conditions between the three methods,forms a new calculation method and carries out the example calculation. The error sources of conventional material balance method have been calculated and analyzed by examples,and the new method has been verified. The calculation results show that the new method has good practicability and reliability,which can be applied to the calculation of geological reserves and water influx of water-drive gas reservoirs.
[1]Wang Nutao.Practical Gas Reservoir Dynamic Analysis Method[M].Beijing:Petroleum Industry Press,2011:93-127.
王怒涛.实用气藏动态分析方法[M].北京:石油工业出版社,2011:93-127.
[2]Qin Tongluo,Li Dang,Chen Yuanqian,et al.Practical Reservoir Engineering Method[M].Beijing:Petroleum Industry Press,1989:138-152.
秦同洛,李璗,陈元千,等.实用油藏工程方法[M].北京:石油工业出版社,1989:138-152.
[3]Huang Zijun,Feng Qing,Wang Tao,et al.Calculation of water influx in interlayer of coal reservoir and control CBM reserves[J].Coal Geology & Exploration,2017,45(4):52-55.
黄子俊,冯青,王涛,等.煤储层夹层水侵量和控制储量的计算方法[J].煤田地质与勘探,2017,45(4):52-55.
[4]Liu Siyuan,Li Zhiping,Chen Pengyu,et al.A new method for calculating the aquifer influx of abnormal high-pressure gas reservoir[J].Special Oil and Gas Reservoir,2017,24(6):139-142.
刘思远,李治平,陈鹏羽,等.异常高压气藏水侵量计算新方法[J].特种油气藏,2017,24(06):139-142.
[5]Yu Qingyan,Mou Zhenbao,Liu Pengcheng,et al.Calcuation method of water influx in gas reservoirs with aquifers[J].Xinjiang Petroleum Geology,2017,38(5):586-591.
于清艳,牟珍宝,刘鹏程,等.含边底水气藏的水侵量计算方法[J].新疆石油地质,2017,38(5):586-591.
[6]Lu Xianmin,He Xiaodong.Study on gas predicting material balance method[J].Nature Gas Exploration and Development,1999,22(3):29-39.
卢晓敏,何晓东.气藏动态预测物质平衡法研究[J].天然气勘探与开发,1999,22(3):29-39.
[7]Shang Yingxue,Li Xiaoping,Song Li.Material balance equation and reserves calculation method considering water soluble gas for shale gas reservoirs[J].Natural Gas Geoscience,2015,26(6):1183-1189.
尚颖雪,李晓平,宋力.考虑水溶气的页岩气藏物质平衡方程及储量计算方法[J].天然气地球科学,2015,26(6):1183-1189.
[8]Zhang Xingmian,Feng Qihong,Wang Xusheng,et al.Establishment and application of material balance equations for low-rank coalbed methane reservoirs[J].Natural Gas Geoscience,2013,24(6):1311-1315.
张先敏,冯其红,汪旭升,等.低煤阶煤层气藏物质平衡方程建立及应用[J].天然气地球科学,2013,24(6):1311-1315.
[9]Wang Nutao,Tang Gang,Ren Hongwei.Optimized calculatingmethod of aquifer influx and parameters for water drive gas reservoirs[J].Nature Gas Industry,2005,25(5):75-77.
王怒涛,唐刚,任洪伟.水驱气藏水侵量及水体参数计算最优化方法[J].天然气工业,2005,25(5):75-77.
[10]Li Chuanliang.Theoretical study of production indicative curves [JP]from gas reservoir[J].Xinjiang Petroleum Geology,2002,23(3):236-238.
李传亮.气藏生产指示曲线的理论研究[J].新疆石油地质,2002,23(3):236-238.
[11]Li Chuanlaing,Xian Lidong.Easy determination of water influx in reservoirs[J].Xinjiang Petroleum Geology,2004,25(1):53-54.
李传亮,仙立东.油藏水侵量计算的简易新方法[J].新疆石油地质,2004,25(1):53-54.
[12]Li Chuanliang.Fundamentals of Reservoir Engineering[M].Beijing:Petroleum Industry Press,2011.
李传亮.油藏工程原理[M].北京:石油工业出版社,2011.
[13]Li Chuanliang.Determination of water influx in gas reservoirs[J].Xinjiang Petroleum Geology,2003,24(5):430-431.
李传亮.气藏水侵量的计算方法研究[J].新疆石油地质,2003,24(5):430-431.
[14]Liu Shichang,Li Min,Wu Yang,et al.Simple calculation of OGIP and water influx in gas pool by water drive process[J].Xinjiang Petroleum Geology,2008,29(1):88-90.
刘世常,李闽,巫扬,等.计算水驱气藏地质储量和水侵量的简便方法[J].新疆石油地质,2008,29(1):88-90.
[15]Liao Yuntao.Regression formula for calculating natural water influx[J].Petroleum Exploration and Development,1990(1):71-75.
廖运涛.计算天然水侵量的回归公式[J].石油勘探与开发,1990(1):71-75.