摘要
深层致密气藏“两低两高”的地质特征,即低孔隙度、低渗透率、高含水饱和度、高非均质性,决定了该类气藏的开发特点,即自然产量低,往往达不到工业气流标准;生产压差大,稳产基础薄弱。从非常规天然气的存在、工艺、工程等方面分析了预探井失效的原因,研究了深层致密气藏的异常渗流机理及其影响因素。多学科有效协作是深层致密气藏勘探开发成功的关键,只有以经济效益为中心,坚持勘探开发一体化,加强以提高气藏单井产能为核心的配套工艺技术攻关,才能实现深层致密气藏的高效勘探开发。
The geological characteristics of ' two low and two high' , i. e. , low porosity, low permeability, and high water saturation and high heterogeneity decided the de-velopment features of the tight deep-seated gas reservoirs , which had low natural gas rate, was unable to reach commercial standard usually,and had great production pressure drop with weak basis of stable production. Failure reasons for wildcat wells were analyzed from the aspects of existing of the unconventional natural gas, technology and engineering. And abnormal percolation mechanism and its influencing factors in the deep-seated tight gas reservoirs were studied. Effective multidisciplinary cooperation was the key to successful exploration of the deep-seated tight gas reservoirs. High efficiency development in this kind of gas reservoirs could be achieved only by taking economic benefit as the center, putting integration of exploration and development in practice, and intensifying studies of set technologies to improve single well gas rate mainly.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2005年第6期37-39,70,共4页
Petroleum Geology and Recovery Efficiency
关键词
致密气藏
开发评价
开采工艺
气层保护
渗流机理
tight gas reservoirs, development evaluation , production technology, gas formation protection, percolation mechanism
