鄂西渝东区东岳庙段页岩气压裂实践与分析

Practice and Analysis of Shale Gas Fracturing of Dongyue Temple Member in Western Hubei and Eastern Chongqing

前期评价表明,江汉油田部分区块页岩气富集、地质条件优越,其中鄂西渝东区被评为中石化南方Ⅰ类区块,具有巨大的勘探开发潜力。鄂西渝东区东岳庙段的页岩气压裂实践证明缝网压裂技术在工艺上是可行的,陆相东岳庙段页岩储层地层压力系数高、天然裂缝发育,有利于页岩气的大规模缝网压裂改造。微地震裂缝监测结合施工曲线有助于分析压裂过程中具体现象,但应加强裂缝监测手段及精度提升研究,加强数据的校核及干扰的排除以提高监测结果的可靠性。

Early evaluation shows that some sections of Jianghan Oilfield contain abundant shale gas and have superior geological conditions. Among these sections Western Hubei and Eastern Chongqing are regarded as first--class blocks in South Sinopec and have huge exploring potential. Practice of shale gas fracturing of Dongyue Temple Member has proved that net seam fracturing technology is feasible technically. In Dongyue Temple Member with continental facies, formation pressure of shale reservoir has a high coefficient and natural fractures develop, which is in favor of large--scale net seam fracturing transformation of shale gas. Microseism fissure monitoring combined with operating curve is conducive to the analysis of specific phenomenon in fracturing process. However, it is necessary to strengthen the research on improvement of fissure monitoring method and accuracy and enhance data check and elimination of interference to improve the reliability of monitoring result.