2016年10月 SSE
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
DOI:10.3969/J.ISSN.1000-3754.2016.05.034
常压页岩气水平井压后排采控制参数优化
Oet，2016 Vol. 35 No. 5
晓冰1.2蒋廷学1,2卫然苏瑷12贾长贵1,2李双明"2
（1.中国石油化工股份有限公司石油工程技术研究院，北京100101； 2.页岩油气富集规律与有效开发国家重点实验室，北京100101）
摘要：为了精细描述页岩气水平井较长的排采周期，基于商业模拟器Eclipse的双孔双渗模型，将压裂过程等效为注水过程，并进行地层压力场及饱和度场的初始化，以消除常规压裂井数值模拟忽略压裂施工对排采影响的局限性。基于渝东南某常压页岩气数据，建立了多段压裂水平井压后排采模型，并优化了排采参数。结果表明：压后立即采取返排措施，排采压差为12MPa以上，初期日排液量不小于50m，压裂液同步彻底破胶，常压页
岩气水平井排采效果较好。以此为基础，指导该区2口水平井的压后排采，取得了较好的效果。关键词：常压页岩气；水平并；返排；数值模拟；参数优化
文章编号：1000-3754（2016）05-0170-05
中图分类号：TE357
文献标识码：A
OPTIMIZATIONOFTHECONTROLLINGPARAMETERSOFTHEPOST-
FRACFLOWBACKANDPRODUCTIONFORNORMAL-PRESSURE
SHALE-GAS HORIZONTAL WELLS
BIAN Xiaobing'-, JIANG Tingxue'-, WEI Ran', SU Yuan'-2, JIA Changgui'-2, LI Shuangming'-2(1. Sinopec Research Institute of Petroleum Engineering, Bejing 100101, China; 2. Shale Gas Enriching Lawes
and EfectiveDeelopment of StateKeyLaboratory,Bejing 100101,China)
Abstract: In order to finely characterize the long-period flowback and production of the horizontal well in a shale gas reservoir, on the basis of the dual-porosity and dual-permeability model of the commercial simulator Eclipse, the fracturing process was equivalent to one of the water injection, the initializations were conducted for the forma tion pressure and saturation fields so as to eliminate the limitations of ignoring the influences of the fracturing opera-tion on the flowback and production for the numerical simulation of the conventional fractured wells. Based on the data of the normal-pressure shale gas reservoir in Southeast Chongqing, the model of multi-fractured horizontal well was established for the post-frac flowback and production, and moreover the corresponding parameters were opti-mized. The results show that the rapid flowback after the fracturing, the differential pressure is be above 12 MPa, and the initial daily liquid production is no less than 50 m', the fracturing fluid is broken synchronously and com pletely, thus much better operation effects can be achieved for the normal-pressureshale-gas horizontal wells. On the
收稿日期：2015-12-21
改回日期：2016-06-30
基金项目：国家重大科技专项（2016ZX05061-002）；国家自然科学基金（51490653）；中国石化科技攻关项目
(P14091)。
作者简介：下晓冰，男，1985年生，副研究员，博士，主要从事水力压裂优化设计及数值模拟工作。
E-mail : xiaobingbian@ 126. com
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