基于钻井液污染的煤储层类型划分及其开发特征
TE254%P634; 为了研究煤储层在钻井液污染下的煤层气开发特征,以沁水盆地南部柿庄南区块为研究对象,基于渗透率损伤比计算模型,计算钻井液对煤储层的伤害程度,并在此基础上划分储层类型,分析不同煤储层的黏土含量和碎粒煤厚度占比,结合压裂资料和排采资料,分析钻井液污染后不同煤储层钻井的煤层气开发特征.研究结果表明,基于煤储层的污染程度,煤储层可划分为轻度污染、较重污染和严重污染三种类型.其中,严重污染煤储层灰分含量均值为17.69％,碎粒煤厚度占比均值为76.47％,压裂施工时,钻井油压曲线会出现大幅度的下降,稳定时所需破碎压力小,排采时单相水流阶段时间长;轻度污染型储层的灰分含量均值为10....
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| Published in | 中国矿业 Vol. 30; no. 6; pp. 214 - 220 |
|---|---|
| Main Authors | , , , , , |
| Format | Magazine Article |
| Language | Chinese |
| Published |
中国矿业大学(北京)地球科学与测绘工程学院,北京100083%中联煤层气有限责任公司,北京100026
01.06.2021
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-4051 |
| DOI | 10.12075/j.issn.1004-4051.2021.06.026 |
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| Abstract | TE254%P634; 为了研究煤储层在钻井液污染下的煤层气开发特征,以沁水盆地南部柿庄南区块为研究对象,基于渗透率损伤比计算模型,计算钻井液对煤储层的伤害程度,并在此基础上划分储层类型,分析不同煤储层的黏土含量和碎粒煤厚度占比,结合压裂资料和排采资料,分析钻井液污染后不同煤储层钻井的煤层气开发特征.研究结果表明,基于煤储层的污染程度,煤储层可划分为轻度污染、较重污染和严重污染三种类型.其中,严重污染煤储层灰分含量均值为17.69％,碎粒煤厚度占比均值为76.47％,压裂施工时,钻井油压曲线会出现大幅度的下降,稳定时所需破碎压力小,排采时单相水流阶段时间长;轻度污染型储层的灰分含量均值为10.07％,碎粒煤厚度占比均值为34.85％,油压曲线整体比较稳定,下降幅度不明显,单相水流阶段时间短;较重污染型储层的灰分含量均值为13.04％,碎粒煤厚度占比均值为59.65％,油压曲线与易伤害型钻井类似,但下降幅度小于易伤害钻井,稳定时所需的破碎压力高于易伤害型储层钻井,排采时单相水流阶段时间介于上述两者之间. |
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| AbstractList | TE254%P634; 为了研究煤储层在钻井液污染下的煤层气开发特征,以沁水盆地南部柿庄南区块为研究对象,基于渗透率损伤比计算模型,计算钻井液对煤储层的伤害程度,并在此基础上划分储层类型,分析不同煤储层的黏土含量和碎粒煤厚度占比,结合压裂资料和排采资料,分析钻井液污染后不同煤储层钻井的煤层气开发特征.研究结果表明,基于煤储层的污染程度,煤储层可划分为轻度污染、较重污染和严重污染三种类型.其中,严重污染煤储层灰分含量均值为17.69％,碎粒煤厚度占比均值为76.47％,压裂施工时,钻井油压曲线会出现大幅度的下降,稳定时所需破碎压力小,排采时单相水流阶段时间长;轻度污染型储层的灰分含量均值为10.07％,碎粒煤厚度占比均值为34.85％,油压曲线整体比较稳定,下降幅度不明显,单相水流阶段时间短;较重污染型储层的灰分含量均值为13.04％,碎粒煤厚度占比均值为59.65％,油压曲线与易伤害型钻井类似,但下降幅度小于易伤害钻井,稳定时所需的破碎压力高于易伤害型储层钻井,排采时单相水流阶段时间介于上述两者之间. |
| Author | 李建红 赵石虎 吴翔 王延斌 韩文龙 缪欢 |
| AuthorAffiliation | 中国矿业大学(北京)地球科学与测绘工程学院,北京100083%中联煤层气有限责任公司,北京100026 |
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| Author_FL | LI Jianhong WANG Yanbin ZHAO Shihu WU Xiang MIAO Huan HAN Wenlong |
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| Keywords | 钻井液 煤储层类型 煤层气开发 柿庄南区块 |
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| Title | 基于钻井液污染的煤储层类型划分及其开发特征 |
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