摘要
为了得到柿庄区块目标区块钻完井工程因素对煤层气产能的影响规律,针对该区块220余口开发井的钻完井资料进行了统计分析,研究了钻井液体系及储层保护情况、固井质量、井径扩大率及压裂液用量、砂比、压降、煤粉等影响因素,通过对比不同类型产气井的钻完井资料及生产情况,得出这些因素对煤层气产能的影响规律。研究结果表明:钻井工程中的钻井液污染、固井质量差、井径扩大率超标等均会对煤层气排采产生不良影响;压裂工程中,煤层气产量与入井液量、砂比成正比关系,与施工压降、煤粉产出量呈反比关系。针对不同影响因素,结合分析结果对目标区块煤层气井的钻采工程提出了合理建议,建议钻井工程中采用清洁钻井液体系,如改性清水钻进、无固相盐水钻井液体系等,可减少钻井液造成的储层伤害。
In order to have a influence law of the well drilling and completion engineering factors to coalbed methane production in Shizhuang Block, according to the well drilling and completion information of over 220 wells in the block, a statistic analysis was conducted and a study was conducted on the drilling fluid system and the reservoir protection condition, well cementation quality, well diameter en- largement rate and fracturing liquid volume, sand ratio, pressure drop rate, coal cutting and other influence factors. With the comparison on the well drilling and completion information and production condition of the different type gas production wells, those factors of the iallu- ence law to the coalbed methane production capacity were obtained. The study results showed that in the drilling engineering process, the drilling liquid pollution, poor well cementation quality, over well diameter enlargement rate and others all would cause a poor influence to the eoalbed method drainage production. In the fracturing engineering process, the eoalbed method production would be a direct proportion relation to the well liquid volume and sand rate and would be an inverse relation to the construction pressure drop and coal cutting produc- tion. According to the different influence factors,in combination with the analysis resuhs,rational proposals were provided on the drilling and drainage engineering of the eoalbed method well in the target block. In order to reduce the reservoir damages caused by the drilling liq- uid, a clean drilling liquid system, including the modified clean water liquid drilling, non-solid phase brine drilling liquid system and oth- ers were proposed.
作者
贾宗文
刘书杰
耿亚楠
张滨海
于姣姣
JIA Zongwen;LIU Shujie;GENG Yanan;ZHANG Binhai;YU Jiaojiao(Drilling and Production Research Institute, CNOOC Research Institute, Belting 100028, China;Technology Research and Development Center, CNOOC Oil, Gas and Power Group Co., Ltd., Belting 100028, China)
出处
《煤炭科学技术》
CAS
北大核心
2017年第12期182-188,共7页
Coal Science and Technology
基金
中国海洋石油有限公司综合科研资助项目(YXKY-2016-ZY-08)
关键词
钻完井工程
压裂工程
煤层气产能
柿庄区块
well drilling and completion engineering
fracturing engineering
eoalbed methane production eapacity
Shizhuang Block
作者简介
贾宗文（1986-），男，山东肥城人，工程师，硕士。Tel：010-84524093，E-mail：jiazw@cnooc．com．cn
