致密火山岩气藏压裂水平井产能预测方法

doi:10.11885/j.issn.1674-5086.2013.11.26.04

摘要/Abstract

摘要：

水平井多段分级压裂是目前开发致密气藏最有效的方式之一，通过对水平井非稳态产能模型的研究可以有效预测压裂水平井的产能特征及确定各因素对产能的影响。将致密火山岩储层多级压裂水平井的渗流划分为3 个阶段，考虑不同区域不同渗流阶段的渗流特征和机理，建立了基质–裂缝、裂缝–近井筒和裂缝–井筒的耦合流动方程。以椭圆形渗流理论和多井干扰下的叠加原理为基础，通过保角变换、当量井径原理，建立了多级裂缝相互干扰下的压裂水平井非稳态产能预测模型，运用于实际并进行了各参数的敏感性分析。实例计算表明，致密火山岩气藏压裂水平井生产初期产量高，产气量随着时间逐渐降低。初期产量高、递减较快，后期产量低、递减较慢、产量趋于平缓。通过对启动压力梯度、敏感系数、滑脱因子等因素进行敏感性分析可知，各个影响因素均存在一个最佳取值范围。

关键词: 致密火山岩气藏, 多级压裂水平井, 非瞬态效应, 产能预测

Abstract:

The technology of multi-fractured horizontal well is the one of the most effective methods to develop tight volcanic rock reservoir. Through the research on the unsteady productivity prediction model of multi-fractured horizontal well in tight volcanic rock reservoirs，the productivity characteristics of multi-fractured horizontal well can be effectively predicted and the contributions of many factors to productivity can be confirmed，both of which can guide the development of gas reservoir. The porous flow from tight volcanic rock formation to multi-fractured horizontal well can be divided into three stages. In consideration of the characteristics and mechanism of porous flow in different regions and at different stages，three coupled jingxingequations，the equations of porous flow from matrix to fracture，from fracture near wellbore region and from new wellbore region to wellbore，are created. Meanwhile，based on elliptic seepage theory and superposition principle in conditions of multi-well interference，through the theories of conformal transformation and equivalent wellbore diameter，an unsteady productivity prediction model of multi-fractured horizontal well in tight volcanic rock reservoir is constructed. This new model is utilized in gas field and sensitivity analysis of many coefficients is conducted. The calculation results suggest that the primary productivity of multi-fractured horizontal well in tight volcanic rock formation is high，and gas productivity declines gradually as time goes by. The characteristics of productivity are high productivity and high decline rate at preliminary stage，and low productivity，low decline rate and nearly constant productivity at late stage. All influencing factors，threshold pressure gradient， compaction coefficient and slippage factor，are found to have an optimal value spectrum through sensitivity analysis.

Key words: tight volcanic rock reservoir, multi-fractured horizontal well, unsteady state, productivity prediction

王强1，2，童敏1，武站国3，魏漪1. 致密火山岩气藏压裂水平井产能预测方法[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.11.26.04.

Wang Qiang1，2, Tong Min1, Wu Zhanguo3, Wei Yi1. An Unsteady Productivity Prediction Method of Multi-fractured Horizontal Well in Tight Volcanic Rock Reservoir[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.11.26.04.

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参考文献

[1] 郎兆新，张丽华，程林松. 压裂水平井产能研究[J]. 石
油大学学报：自然科学版，1994，18（2）：43–46．
Lang Zhaoxin，Zhang Lihua，Cheng Linsong. Investigation
on productivity of fractured horizontal well[J]. Journal
of the University of Petroleum，China，1994，18（2）：
43–46．
[2] 宁正福，韩树刚，程林松，等. 低渗透油气藏压裂水平
井产能计算方法[J]. 石油学报，2002，23（2）：68–71．
Ning Zhengfu，Han Shugang，Cheng Linsong，et al. Productivity
calculation method of fractured horizontal wells
in low permeability oil or gas field[J]. Acta Petrolei Sinica，
2002，23（2）：68–71．
[3] 李廷礼，李春兰，吴英，等. 低渗透油藏压裂水平井产
能计算新方法[J]. 中国石油大学学报：自然科学版，
2006，30（2）：48–52．
Li Tingli，Li Chunlan，Wu Ying，et al. A new way to calculate
fractured horizontal wells productivity in low permeability
oil reservoirs[J]. Journal of China University of
Petroleum，2006，30（2）：48–52．
[4] 徐严波，齐桃，杨凤波，等. 压裂后水平井产能预测新
模型[J]. 石油学报，2006，27（1）：89–91，96．
Xu Yanbo，Qi Tao，Yang Fengbo，et al. New model for
productivity test of horizontal well after hydraulic fracturing[
J]. Acta Petrolei Sinica，2006，27（1）：89–91，96．
[5] 廉培庆，同登科，程林松，等. 垂直压裂水平井非稳态
条件下的产能分析[J]. 中国石油大学学报：自然科学
版，2009，33（4）：98–102．
Lian Peiqing，Tong Dengke，Cheng Linsong，et al. Analysis
of productivity in unsteady state of vertical fractured
horizontal well[J]. Journal of China University of
Petroleum，2009，33（4）：98–102．
[6] 范子菲，方宏长，牛新年. 裂缝性油藏水平井稳态解产
能公式研究[J]. 石油勘探与开发，1996，23（3）：52–57，
63．
Fan Zifei，Fang Hongchang，Niu Xinnian. A steady solution
formula of horizontal well productivity in a fractured
reservoirs[J]. Petroleum Exploration and Development，
1996，23（3）：52–57，63．
[7] 曾凡辉，郭建春，尹建. 井筒与油藏耦合的压裂水平
井非稳态产能计算模型[J]. 现代地质，2011，25（6）：
1159–1166．
Zeng Fanhui，Guo Jianchun，Yin Jian. An unsteady state
computation model of fractured horizontal well coupling
with reservoir[J]. Geoscience，2011，25（6）：1159–1166．
[8] 朱维耀，张玉广，刘合，等. 大庆敖南特低渗油层非达
西渗流压裂水平井优化技术[J]. 辽宁工程技术大学学
报：自然科学版，2009，28（增刊）：123–126．
Zhu Weiyao，Zhang Yuguang，Liu He，et al. Optimization
method of hydraulic fracturing horizontal wells with extralow
permeability in Daqing Aonan oil reservoirs[J]. Journal
of Liaoning Technical University：Natural Science，
2009，28（S）：123–126．
[9] 冯国庆，刘启国，石广志，等. 考虑启动压力梯度的低
渗透气藏不稳定渗流模型[J]. 石油勘探与开发，2008，
35（4）：457–461.
Feng Guoqing，Liu Qiguo，Shi Guangzhi，et al. An unsteady
seepage flow model considering kickoff pressure
gradient for low-permeability gas reservoirs[J]. Petroleum
Exploration and Development，2008，35（4）：457–461.
[10] Klinkenberr L J. The permeability of porous media to liquids
and gases[J]. API Drilling and Production Practice，
1941（2）：200–213.
[11] 黄炳光，刘蜀知. 实用油藏工程与动态分析方法[M].
北京：石油工业出版社，1998：190–203.
[12] 巴斯宁耶夫K C，费拉索夫A M. 地下流体力学[M]. 北
京：石油工业出版社，1992：189–195.
[13] 郭平，张茂林，黄全华，等. 低渗透致密砂岩气藏开发
机理研究[M]. 北京：石油工业出版社，2009：69–70.
[14] Klinkenberr L J. The permeability of porous media to liquids
and gases[J]. API Drilling and Production Practice，
1941（2）：200–213.
[15] Nura，Yilmazo． Pore pressure fronts in fractured rock
systems[D]．Stanford：Department of Geophysics，Stanford
University，1985.