中新网武汉1月9日电 (武一力许铮)记者8日从湖北省地质局获悉，中国地质科研人员在鄂西地区聚焦二 叠系页岩层系，成功实现非常规油气工业气流突破，开拓了非常规气新层系新类型，新增页岩气地质资 源量达1329.5亿立方米，实现了页岩气勘探从四川盆地向鄂西地区的有效拓展。 在湖北恩施地区，鄂恩页2HF井水平井在二叠系大隆组压裂试气，获得日产气5.06万立方米，拓展了大 隆组的调查新层系；鹤峰地区鄂鹤页3井直井压裂试气，在二叠系栖霞组获得日产气1.07万立方米。 （文章来源：中国新闻网） 该成果进一步丰富和完善了复杂构造区海相非常规气成藏理论，建立了"源储一体、构造保存控藏、裂 缝—孔隙定富"的泥灰岩气成藏模式，对同类地区勘探具有重要科学指导价值。 此外，针对常压页岩气压裂液返排难题，项目组创新形成了"电潜泵+气举+泡排复合管串排采+智能化 监测"试气返排工艺，并在鄂恩页2HF井成功实现高效返排，为常压页岩气经济有效开发提供了关键技 术支撑。 该成果形成的成藏理论认识和高效返排技术，将对复杂构造区页岩气勘查部署产生重要指导作用，具有 显著的理论价值与工程实践意义。(完) ...

近日，大庆钻探在鄂尔多斯盆地郝20井保压取心作业中取得成功，一举创下中石油煤层气公司韩城区块 单井累计取心进尺最多、岩心收获率最高、取心筒数最多、取心层位最全4项纪录，破解了该区域煤岩 层取心难题，为非常规油气勘探提供了新利器。 研发工具破难题 郝20井是中石油煤层气公司在鄂尔多斯盆地伊陕斜坡东部部署的一口直井评价井，设计井深2506米，保 压取心进尺95.77米，担负着评价5#煤层和8#煤层储层及含气情况的重要使命。 该井需要获取深层煤层各项储层参数，兼探大宁—吉县区块山西组和本溪组页岩储层及含气情况，同时 需要探索太原组灰岩、马家沟组碳酸盐岩储层及含气性。然而，韩城区块煤层气储层具有煤层气层系复 杂、气体易逸散的复杂特征，常规取心技术难以保留地层原始状态。取出来的岩心如果不"原汁原味"， 将直接影响储层评价和含气量测试的准确性，进而影响整个区域的勘探决策。 针对郝20井复杂地质条件，大庆钻探工程技术研究院工程技术转化推广分公司取心团队对自主研发的 DQBYM194-80型保压取心工具进行了针对性升级。他们完善了工具自锁式球阀密封结构，解决了高压 地层密封难题。 "随着我国非常规油气勘探向深层、复杂储层延伸 ...

Core Insights - China National Petroleum Corporation's Daqing Drilling achieved a significant technological breakthrough in coalbed methane exploration in the Ordos Basin, utilizing a self-developed pressure-maintaining coring tool to address coring challenges [1][2] - The Daqing Drilling team set four records in the Han Cheng block, including the highest cumulative coring depth per well, the highest core recovery rate at 98.38%, the most comprehensive coring layers, and the fastest mechanical drilling speed [1] - The successful implementation of a customized tool, refined processes, and comprehensive monitoring during the coring operation has provided critical geological data and technical support for coalbed methane exploration in the Ordos Basin [2] Group 1 - Daqing Drilling's new coring technology allows for the preservation of the original state of the reservoir, which is crucial for accurate evaluation of gas content and reservoir parameters [1][2] - The Daqing Drilling team formed a collaborative task force to address the complex geological conditions of the Hao 20 well, leading to targeted upgrades of the pressure-maintaining coring tool [1] - The core recovery rate exceeded design expectations by 18.38%, indicating the tool's effectiveness in high-pressure formations [1] Group 2 - The operational model developed by Daqing Drilling includes customized tools, refined processes, and full monitoring, achieving the technical goal of maintaining pressure during coring [2] - The drilling team optimized the well trajectory and adjusted drilling parameters to create a stable downhole environment for coring operations [2] - This technological advancement not only aids in precise resource evaluation but also enhances the optimization of development plans for coalbed methane [2]