渤中凹陷太古界潜山破碎地层取心技术

Coring technology of the Archean buried-hill fractured strata in Bozhong sag

和鹏飞 李振坤 刘杰 赵秋璇 冯晟 张彬奇

HE Pengfei LI Zhenkun LIU Jie ZHAO Qiuxuan FENG Sheng ZHANG Binqi

中海油能源发展股份有限公司工程技术分公司 中海石油(中国)有限公司天津分公司 中国石油大学(北京)安全与海洋工程学院

CNOOC EnerTech-Drilling & Production Co., Tianjin 300459, China Tianjin Branch of China National Offshore Oil Co., Ltd., Tianjin 300459, China School of Safety and Ocean Engineering, China University of Petroleum (Beijing), Beijing 102249, China

为了落实渤中凹陷太古界潜山储层岩性、物性及含油气性，为太古界潜山储量申报提供实物资料，设计在太古界潜山钻遇油气显示层进行取心作业。针对潜山顶面风化壳破碎严重、内幕储集空间发育段为中硬厚层花岗岩地层，地层压实程度高等问题，设计并应用了高强度取心工具，通过优化设计取心参数和工序、制定取心收获率保障技术措施，在渤中凹陷2口井累计取心4次，平均收获率达到97%。该技术可推广应用于潜山破碎硬质地层的取心作业。

It was designed to carry out coring operation in the Archean buried hills with oil and gas shows to figure out the lithology, physical property and hydrocarbon bearing property of Archean buried-hill reservoirs in Bozhong sag, so as to provide the substantial data for the reserve declaration of Archean buried hills.In view of the serious fragmentation of weathering crust at the top of the buried hill, the existence of the medium-hardness thick granite formation in the development section of inner reservoir space and the high degree of formation compaction, high-strength coring tool was designed and applied, and the coring parameters were optimally designed.Core recovery guaranteeing measures were developed by means of procedure design.When this technology was applied to the coring of 2 wells in Bozhong sag by 4 times, the average recovery was up to 97%.In conclusion, this technology can be popularized and applied to the coring operation in buried-hill broken competent strata.

10.13639/j.odpt.2018.S0.032