“氦气形成机制与富集规律及...”课题交流会在成都顺利召开_齐雯.pdf

No.6雷启鸿等：鄂尔多斯盆地页岩油水平井开发关键科技问题shale oil development are put forward，and reasonable suggestions are put forward according to systematic analysis.The drilling rate of shale oil horizontal wells can be divided into longitudinal drilling rate and transverse drilling rate.Improving the longitudinal drilling rate and transverse drilling rate of high-quality reservoir is an important measure to increase the production of a single well.When deploying horizontal wells，priority can be given to the extension direction of high-quality reservoirs to improve the drilling rate of high-quality reservoirs.The contribution ratio of elastic energy of fracturing fluid to recovery is relatively low，so the reservoir reconstruction should not overemphasize large sand volume，large fluid volume，and large displacement，but should fully consider well spacing，longitudinal interlayer distribution，and fracture development，and optimize fracturing scale，construction displacement and other parameters.The change of source rock quality and the strength of diagenesis are the main reasons for the difference of oil content in sand bodies，which affect the selection of favorable areas and the distribution of high-quality reservoirs.Pre-CO2 volumetric fracturing has obvious energy increase effect，which is an effective means to reduce viscosity and improve oil recovery.It is an important measure to ensure the efficient development of shale oil in Changqing Oilfield Company by deepening the comprehensive geological research，clarifying the main controlling factors of differential shale oil accumulation，elaborating the three-dimensional sweet spot distribution，and exploring more effective development methods.Keywords：Ordos Basin；Shale oil development；Chang 7 Member；Key issuesFoundation items：The Forward-looking Fundamental Research Major Science and Technology Project（Grant No.2021DJ1806）；the National Key Basic Research and Development Program（Grant No.2014CB239003）.“氦气形成机制与富集规律及勘查技术研究”课题交流会在成都顺利召开2023年 4月 2022日，中国石油集团公司氦气产业链项目 01课题“氦气形成机制与富集规律及勘查技术研究”首次线下交流会在成都召开。课题下设 7个专题，研究内容囊括了氦气富集机理和分布规律、氦气勘探技术研究和有利勘探区带优选等。参加此次会议的有来自中国石油勘探开发研究院及西北分院、西南油气田公司、大庆油田公司、长庆油田公司、塔里木油田公司的 30多位科研骨干。会议邀请了 7位氦气研究专家和油气勘探家组成专家组为课题和下设专题进行把关、指导。会议首先由课题长秦胜飞对 2022年的阶段成果进行了总结，并对今后的工作进行了规划和安排，随后秦胜飞、陈燕燕、齐雯、王磊、张连群、张文、康锐分别代表各专题对 2023年以来开展的工作、取得的认识以及将来的工作计划进行了汇报交流。课题自 2022 年立项以来，各专题克服因疫情等不可抗拒因素的影响，取得了 4 项重要阶段性成果：第一，通过对全国氦气资源的系统性全面调查，新筛查出 8 个可提氦气田，为提氦产业链提供了资源保障；第二，提出富氦气藏必须经历“多源聚氦、主源富氦”的观点，提出古老地层水中水溶氦脱气富氦，是富氦气藏的主要富集机理；第三，提出了富氦气藏分布规律和氦气富集主控因素；第四，初步提出富氦气藏勘探原则和有利勘探方向。研究成果为氦气富集理论的建立奠定了较好的基础，为富氦领域和区带的优选提供了理论指导。成果获得了专家评审组的高度肯定，同时建议课题组补充采集天然气样品和开展分析化验，以此细化对富集机理和过程的研究，针对各盆地则需要进行深入解剖，深化各盆地氦气富集规律、主控因素等研究。（齐雯 供稿）简 讯949