郑庄区块煤层气评价井压裂效果影响因素分析

发布时间：2018-04-11 11:03

本文选题：煤层气压裂 + 压裂施工曲线类型　；参考：《煤炭科学技术》2016年S1期

【摘要】：结合郑庄区块50口评价井的基础地质资料和压裂施工数据,划分压裂施工曲线类型,分析不同曲线类型的压裂效果,研究压裂效果地质影响因素,综合不同区域地质影响因素进行压裂区优选。结果表明:郑庄区块压裂曲线可以分为稳定型、稳定波动型、下降型和波动型4种,对应压裂效果由好变差。在工程条件差别不大的情况下,研究区气井压裂效果受多种地质因素影响。其中煤体结构是主控因素,构造条件和地应力次之,三者通过影响压裂裂缝形态和扩展方式影响压裂效果,埋深是通过影响最小水平主应力大小影响压裂效果的间接因素,各个地质因素同压裂曲线类型之间有良好的配伍关系。根据不同区域地质影响因素条件将研究区划分为5个主要区域,可用于指导研究区压裂施工。
[Abstract]:Based on the basic geological data and fracturing operation data of 50 evaluation wells in Zhengzhuang block, the fracturing curve types are divided, the fracturing effects of different curve types are analyzed, and the geological influencing factors of fracturing effect are studied.The optimum selection of fracturing area is carried out by synthesizing different regional geological influencing factors.The results show that the fracturing curve of Zhengzhuang block can be divided into four types: stable type, stable type, descending type and fluctuating type, and the fracturing effect is changed from good to bad.In the case of little difference in engineering conditions, the fracturing effect of gas wells in the study area is affected by many geological factors.The coal structure is the main controlling factor, the structural condition and the in-situ stress are the second, the three factors affect the fracturing effect by influencing the fracturing fracture shape and the expansion mode, and the buried depth is the indirect factor that affects the fracturing effect by the minimum horizontal principal stress.There is a good compatibility between each geological factor and the type of fracturing curve.The study area is divided into five main areas according to the conditions of different regional geological factors, which can be used to guide the fracturing operation in the study area.
【作者单位】：中国地质大学(北京)能源学院;中国石油华北油田分公司;中国地质图书馆;
【基金】：国家自然科学基金资助项目(41472137) 全国优秀博士学位论文作者专项资金资助项目(201253) 山西省煤基重点科技攻关资助项目(MQ2014-01)
【分类号】：TE377

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