摘要
水合物试采的先决条件是目标是否符合地质与工程的可采条件。然而,由于前期无经验可循,尚无可定量化评价目标的方法。为克服水合物试采目标优选难题,从地质与工程两个角度建立了试采目标综合评价指标体系,在以储层孔隙度、水合物层厚度、水合物饱和度、储层固有渗透率、储层原位温度与压力作为6个地质因素,以储层水深、海底坡度、强度与上覆层厚度作为4大工程因素,提出基于模糊综合评判的水合物试采目标评价方法,初步实现对试采目标的综合定量化评价。以南海北部神狐海域4个典型水合物站位XX01、XX02、XX03与XX04为例进行了案例分析,获取了工程因素与地质因素的权重,并进一步确定了四个站位的生产潜力,且以4个站位得到的评判结果矩阵的相对值对比,得到优先推荐XX02站位作为水合物试采的目标站位,该研究结果取得了良好效果。本套方法可为将来智能定量化开展水合物开采目标优选、促进水合物产业化提供支撑作用。
Prerequisites for hydrate production field test are whether the target meets the geological and engineering conditions for recoverability.However,since previous work is limited,there is no method to quantitatively evaluate the targets.To overcome the optimization problem of hydrate production test target wells,the comprehensive evaluation objective system is established from both geological and engineering perspectives.The six geological factors include porosity,hydrate thickness,hydrate saturation,intrinsic permeability,in-situ temperature and pressure;whilst the four engineering factors are water depth,underwater gradient,intensity and overlying layer thickness.The evaluation method(based on fuzzy comprehensive evaluation)is put forward to preliminary determine the comprehensive quantitative evaluation of production test target.Based on four typical hydrate coring sites(XX01,XX02,XX03 and XX04)in the Shenhu area of the northern South China Sea,the weights of the geological and engineering factors were estimated.The results show that the gas production potential at these four sites is unattractive.Nonetheless,site XX02 has the highest weight and was chosen as the target.The method of this study yielded good outcomes,and can provide support to optimize hydrate mining targets in intelligent quantification and promote hydrate industrialization in the future.
作者
胡高伟
吴能友
李琦
白辰阳
万义钊
黄丽
王代刚
李彦龙
陈强
HU Gaowei;WU Nengyou;LI Qi;BAI Chenyang;WAN Yizhao;HUANG Li;WANG Daigang;LI Yanlong;CHEN Qiang(Key Laboratory of Gas Hydrate,Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao,Shandong 266071,China;School of Ocean Sciences,China University of Geosciences,Beijing 100083,China;The Unconventional Oil and Gas Institute,China University of Petroleum,Beijing 102249,China)
出处
《现代地质》
CAS
CSCD
北大核心
2022年第1期202-211,共10页
Geoscience
基金
国家重点研发计划项目“水合物试采、环境监测及综合评价应用示范”(2017YFC0307600)
国家自然科学基金项目(91858208,41706064,41906189,41976205)。
关键词
海域天然气水合物
试采目标
定量评价
神狐海域
marine natural gas hydrate
production target well
quantitative evaluation
Shenhu area
