储层改造对天然气水合物开采产能的影响  

Influence of reservoirs reconstruction on nature gas hydrate production capacity

作　　者：李占钊 万庭辉 梁前勇[1] 马超 李柯良 LI Zhan-zhao;WAN Ting-hui;LIANG Qian-yong;MA Chao;LI Ke-liang(China Geological Survey,Guangzhou Marine Geological Survey,Guangzhou,510760)

机构地区：[1]中国地质调查局广州海洋地质调查局,广东广州510760

出　　处：《地下水》2020年第3期120-124,共5页Ground water

基　　金：广东省促进经济高质量发展专项资金海洋经济发展项目:Guangdong MEPP Fund[GDOE(2019)A39]。

摘　　要：在常规油气田开采中,储层改造技术是一种有效的增产、增注技术,其在水合物矿藏开采中有较好的应用前景,但到目前为止国内还没有关于储层改造技术对水合物矿藏产能增产效果的评价研究。本文利用劳伦斯伯克利国家实验室开发的水合物藏开采模拟软件TOUGH+HYDRATE,以中国地质调查局2007年采集的南海北部神狐海域SH7的测井数据为基础,建立了实际水合物藏分层地质模型,分析对比了单一垂直井在储层改造条件下和裸眼完井条件下井底流压均为4. 5 MP时的产气产水变化规律。模拟结果表明,在本文假设的储层改造条件下水合物矿藏产能可提高约3倍。研究结果可为南海神狐海域和类似地区天然气水合物矿藏实施增产工程技术手段提供理论指导。In conventional oil and gas exploitation methods,reservoir reforming is a well acknowledged technology to effectively increase injection pore volume and improve oil production performance.It is a prospective technology in exploiting hydrate mineral deposits.In this study,an hydrate reservoir mining simulation software(TOUGH+HYDRATE),has been applied to establish the actual hydrate reservoir based on the logging data of SH-7 in the northern South China Sea collected by the China Geological Survey in 2007.The software is developed by Lawrence Berkeley National Laboratory.The variation law of gas production and production water has been analyzed and compared within a layer geological model.The well pattern is single vertical well,which is applied under the conditions of either reservoir reconstruction or original reservoir conditions.The bottomhole flow remains constant(4.5MP)in the two cases.The simulation results show that the hydrate reservoir capacity can be increased by about 3 times under the reconstructed reservoir condition.The research results provide simulation reference for the exploitation of natural gas hydrate deposits in the Shenhu sea area and similar areas within the South China Sea.

关 键 词：天然气水合物 降压开采 储层改造 数值模拟 神狐海域 

分 类 号：P618.130.2[天文地球—矿床学]