湘鄂西构造复杂区页岩气井含气性及可压性评价——以湖北鹤峰区块HY1井为例

Compressive evaluation and gas-containing of shale gas well in tectonic complex area of western Hunan and Hubei: taking Well HY1 of Hefeng Block as an example

洪克岩 朱亮亮 程晓艳 姜生玲 谢伍平 佟恺林3

中国华电集团清洁能源有限公司，北京 100160 四川页岩气勘探开发有限责任公司，四川 成都 610000 四川省能投矿业投资开发有限公司，四川 成都 610000

China Huadian Green Energy Co., Ltd., Beijing 100160, China Sichuan Shale Gas Exploration and Development Co., Ltd., Chengdu 610000, China Sichuan Energy Mining Investment and Development Co., Ltd., Chengdu 610000, China

为了在湘鄂西复杂构造区确定页岩储层的可压性核心评价参数，以湖北鹤峰区块HY1井为例，利用地震、钻井、录井、测井、现场解析及实验室分析测试数据等资料，以中上二叠统页岩沉积相、岩石相分析为基础，以岩石相控制下的储层特征、页岩品质分析为手段，进行页岩气含气性评价，优选有利层段再作可压性评价。以此为基础，建立了湘鄂西构造复杂区内中上二叠统页岩可压性的主要评价指标：脆性矿物体积分数为50%~70%；钻井附近无大断裂或大型裂缝发育较弱；泊松比在0.20~0.25；水平应力差异系数在0.13~0.20。通过深入分析，认为该区中上二叠统页岩基本满足上述评价标准。同时，该套页岩应力差异系数较大，压裂改造工艺技术要求高，对后期的产能建设提出了挑战。

In order to determine the core evaluation parameters of shale reservoir compressibility in the complex tectonic region of western Hunan and Hubei area, taking the well HY1 of Hefeng Block in Hubei as an example, using the data of 2D seismic, drilling, logging, site analysis and laboratory test, based on the sedimentary facies and rock facies analysis of the Middle and Upper Permian, and combined with the means of reservoir characteristics and shale quality analysis under the control of the rock facies, the gas-containing of shale gas was evaluated, the favorable interval optimized, and also the compressibility of shale gas was evaluated. Based on these, the paper established the main evaluation indexes for the compressibility of the middle and upper Permian shale in the tectonic complex region of the western Hubei and Hunan: (1) brittle content is 50%-70%; (2) fracture development is weak; (3) Poisson′s ratio is 0.20-0.25; (4) difference coefficient of horizontal stress is 0.13-0.20. Through deep analysis, it is believed that the above evaluation criteria are basically met by the middle and upper shale in this region, and the shale has great stress difference coefficient, which leads to the need of high fracturing technology and the new challenges for the later production capacity building.

10.6056/dkyqt201806007