礁滩型碳酸盐岩气藏开发面临的问题及开发技术对策

Developmental Problems and Strategies of Reef-shoal Carbonate Gas Reservoir

礁滩型碳酸盐岩气藏不同于常规碎屑岩气藏,该类气藏的有效开发面临很大问题。龙岗气田是典型的礁滩型碳酸盐岩气藏,地质研究和试采动态特征研究表明气藏储层存在强烈的非均质性,气水关系复杂,部分试采井受地层水影响严重,同时不同类型气井生产特征表现出极大差异。该气藏有效开发主要面临储层非均质性评价、流体分布复杂性描述、储量计算以及产能评价等问题。针对该气藏开发面临的问题以及气藏开发特征,提出4条开发技术对策:①井—震联合开展储层精细描述,提高气藏开发规模;②布井方式采用不规则井网,提高气藏开发效益;③加强动态监测,科学管理气藏,提高气藏管理水平;④坚持"边勘探、边滚动、边建产"的开发思路,降低气藏开发风险。气藏开发技术对策的制定为龙岗气藏有效开发提供指导。

Reef-shoal carbonate gas reservoir is different from conventional sand gas reservoir and the effective development of this kind of reservoir is facing some problems. Longgang Gas field is a typical reefshoal carbonate gas reservoir. The geological research and the trial production showed some characteristics, including the huge heterogeneity of reservoir, the extreme complexity of fluid distribution, the crucial influence on gas wells of formation water and the significant discrepancy in different development wells. The effective development of it mainly encountered problems of reservoir heterogeneity evaluation, fluid distribu tion description, reserves calculation and productivity evaluation. Aiming at these problems and development characteristics, four technical development strategies were proposed. （1）Utilize well-seismic combination technology for fine reservoir description to enlarge the gas reservoir development scale; （2）Use irregu lar well networks in the process of well pattern to improve the efficiency of gas reservoir development;（3） Strengthen dynamic monitoring and increase the ability of scientific management to improve the manage- ment levels of gas reservoir development; （4）Adhere to the development concept of integrated development to reduce the risk of gas reservoir development. The formulation of gas reservoir development technology strategies can provide guidance for the effective development of Longgang gas reservoir.