川南泸州地区页岩气甜点地质工程一体化关键要素耦合关系及攻关方向
姜振学 , 梁志凯 , 申颍浩 , 唐相路 , 吴伟 , 李卓 , 薛子鑫 , 石学文 , 郭婕
地球科学 ›› 2023, Vol. 48 ›› Issue (01) : 110 -129.
川南泸州地区页岩气甜点地质工程一体化关键要素耦合关系及攻关方向
Coupling Key Factors of Shale Gas Sweet Spot and Research Direction of Geology-Engineering Integration in Southern Sichuan
,
页岩气甜点地质工程一体化关键要素分析与评价是页岩气高效勘探开发的必要工作.从甜点优选、钻完井工程、压裂工艺等多方面对川南泸州地区开展研究,结合地质工程一体化研究思路,系统分析了工程要素与地质要素的耦合关系.结果表明:泸州地区地质条件复杂,水平最大主应力方向为NWW-SEE向,由西向东裂缝发育程度减少;天然裂缝方向与最大主应力方向和井轨迹有效匹配提高压裂改造体积,井轨迹方位与地应力夹角大于60°、与裂缝主方向夹角大于20°时,水平井压裂效果越好;通过加密分簇、提高排量、暂堵转向、提高加砂强度等技术优化,可保证深层页岩改造体积及缝网有效性.综上,利用工程与地质双因素耦合分析,开展深层井轨迹与甜点预测关系、深层裂缝体积改造与地应力关系、深层钻‒完井工程与岩石力学关系技术攻关,能够有效推动地质工程一体化的动态运行,提高单井最大可采量和区块最大动用量.
复杂构造区 / 页岩气甜点 / 地质评价 / 水平井开发 / 靶体预测 / 压裂工艺 / 地质工程一体化
complex structure area / shale gas sweet spot / geological evaluation / horizontal good development / target prediction / fracturing technology / geology-engineering integration
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国家自然科学基金项目(42072151)
中国石油西南油气田公司科研项目(2020-57912;20210604-02)
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