[1]刘 斌,尹 琅.低渗致密凝析气藏压裂难点及对策[J].复杂油气藏,2015,(02):76.
　Liu Bin,Yin Lang.Difficulties and strategies of fracturing for tight condensate gas reservoirs with low permeability[J].Complex Hydrocarbon Reservoirs,2015,(02):76.
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低渗致密凝析气藏压裂难点及对策
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2015年02期
页码:
76
栏目:
油气工程
出版日期:
2015-06-25

文章信息/Info

Title:
Difficulties and strategies of fracturing for tight condensate gas reservoirs with low permeability
作者:
刘 斌; 尹 琅
中国石化西南油气分公司工程技术研究院,四川 德阳 618000
Author(s):
Liu Bin; Yin Lang
Petroleum Engineering Technology Research Institute of Southwest Oil and Gas Company,SINOPEC,Deyang 618000,China
关键词:
凝析气藏 压裂液优化 排液 压力控制
Keywords:
gas condensate reservoir;  fracturing fluid optimization;  flowback;  pressure control
分类号:
TE357.1
文献标志码:
A
摘要:
GM区块沙溪庙组气藏埋深2 300～3 100 m,平均孔隙度8.24%,渗透率0.22×10-3 μm2,为低孔低渗致密储层。该类储层压后排液过程中井口压力下降快,返排率低,产量下降快,主要原因是储层的强应力敏感性、地层出砂及凝析油对储层的伤害。针对以上问题,提出了优化压裂液配方和支撑剂组合及控压排液对策。优化的压裂液中破乳剂加量为0.1%,防膨剂加量组合为0.5%WD-5+0.5%BM-B10+1%KCl,支撑剂采用80%的30/50目+20%的40/70目陶粒组合,排液压力控制在15 MPa以上。最终形成了适用于GM沙溪庙凝析油气藏的压裂技术,现场应用18口井均取得较好效果,较前期平均单井测试产量提高129%。
Abstract:
Shaximiao gas reservoirs in Gaomiao block are low porosity and permeability tight reservoirs with a depth of 2,300 m to 3,100 m,an average porosity of 8.24%,and an average permeability of 0.22×10-3 μm2.Due to the reservoir damages caused by strong stress-sensitive,sand production and gas condensate,there are rapid drop of wellhead pressure,low flowback rate,and the fast production decline during flowback after fracturing.Aiming at the problems,it was proposed out that optimizing the fracturing fluid and proppant combination,and pressure control during flowback.The optimized fracturing fluid consists of a 0.1% of the demulsifier,the anti-swelling agent composition,0.5%WD-5+0.5%BM-B10+1%KCl,and the proppant combination with 80% of 30/50 mesh+20% of 40/70 mesh ceramisites.And the pressure is controlled to be more than 15MPa.Finally,it was formed that the fracturing technology suitable for the Shaximiao reservoir.The field applications in 18 wells have achieved good results,with the average single well test production increased by 129%.

参考文献/References:

[1] 沈海超,胡晓庆.非均质低渗凝析气藏压裂后低效原因分析及改进措施研究[J].特种油气藏,2012,19(2):116-119.
[2] 郑军林,陈峰.白庙凝析气田水平井多段压裂技术的实践与认识[J].油气井测试,2014,23(4):50-52.
[3] 马青印.白庙、桥口气田低渗凝析气藏挖潜工艺技术[J].石油天然气学报,2013,35(11):145-149.
[4] 杨立峰,谢正凯,卢拥军,等.煤系烃源岩凝析气藏改造技术研究与应用[J].石油钻采工艺,2O13,35(5):59-63.

备注/Memo

备注/Memo:
收稿日期:2014-12-29; 改回日期:2015-02-03。
作者简介:刘斌(1981—),硕士,高级工程师,现从事压裂工艺及储层改造研究工作。电话:18942898690,E-mail:lb0557@163.com。
更新日期/Last Update: 2015-06-25