摘要
为查明红果区块煤层气勘探潜力,利用煤炭钻孔及煤层气井资料,从地质背景、煤岩煤质、储层物性、含气性和保存条件等入手,系统分析了煤层气富集的基本地质条件,初步评价了煤层气的资源潜力,并对有利富气区进行综合评价与优选。结果认为:红果区块煤储层具有埋深适中(500~1200 m)、累厚大(10.3~25.8 m)、热演化程度中等(0.9%~2.0%)、含气量高(10.8~26.3 m^3/t)等特征,煤层气成藏地质条件优越。综合评价煤层气有利区面积260 km2,资源量422×10^8 m^3,其中I1类有利区位于向斜东部,演化程度高、割理裂隙发育、压力系数高、保存条件优越,是下一步勘探评价的重点目标区。
In order to evaluate the CBM exploration potential of Hongguo Block,the basic geological conditions for the enrichment of CBM reservoirs were analyzed from the aspects such as stratigraphic distribution,coal quality,physical characteristics,gasbearing capacity and preservation conditions by the data of coal drilling and CBM wells.And then the resource potential of CBM was preliminarily accessed.Finally,the favorable gas-rich areas were further optimized.Results show that coal bed in Hongguo Block has the characteristics of moderate burial depth(500~1200 m),large accumulated thickness(10.3~25.8 m),moderate thermal maturity(0.9%~2.0%)and high gas content(10.8~26.3 m^3/t),with superior geological conditions of CBM accumulation.By the comprehensive evaluation,the favorable CBM area is about 260 km2 and the amount of resource is about 422×10^8 m^3.The most favorable area type I1 is located in the east of Panguan syncline,with high thermal evolution degree,developed cleavage and fissure,high pressure coefficient,and superior preservation conditions,which is the primary target area for the next CBM exploration.
作者
周德华
李倩文
蔡勋育
陈刚
ZHOU Dehua;LI Qianwen;CAI Xunyu;CHEN Gang(Sinopec Oilfield Department,Beijing 100728,China;Research Institute of Unconventional Resource,Sinopec Petroleum Exploration and Production Research Institute,Beijing 100083,China)
出处
《油气藏评价与开发》
CSCD
2020年第4期12-16,共5页
Petroleum Reservoir Evaluation and Development
基金
中国石化非常规先导项目“2019年度非常规油气勘探跟踪评价与中长期规划部署研究”(YTBXD-02-05-2019-I)。
关键词
红果区块
煤层气
资源评价
勘探潜力
盘关次向斜
Hongguo Block
CBM
resource assessment
exploration potential
Panguan syncline
