摘要
总结了与河道砂体油气藏、溶洞油气藏描述预测技术和手段等有关的问题。在决口频率不变的情况下河道砂的连通性与沉积(或沉降)速度成反比;单个点坝砂体的内部发育着统一向牛轭湖泥质充填层倾斜的隔夹层,使得砂体内部下半部分横向连通、上半部分不连通。多分量三维横波勘探技术可预测裂缝型储集层的裂缝方向和密度,对某些碳酸盐岩油气藏和煤层气藏勘探十分有用。溶洞油气藏的形成机制和发育特征受很多地质因素的影响,一般可将其分为横向连通的溶洞油气藏和横向局限的溶洞油气藏,前者纵向上又可分为洞顶角砾化裂缝储集层段、洞内泥质充填隔层段和洞底垮塌角砾岩储集层三部分。有关地震油藏描述的一些新方法、新手段在不断地出现和完善,它们对提高油藏描述精度和效率起着重要作用。
Pu Renhai Cai Qixin. Pu Renhai Associate Professor Geologic Exploration Northwest University Xi'an 710069 China Abstract This paper reviewed the characterization and prediction techniques or methods related to channel sand body pool and cavern pool. In the case of unvaried crevasse frequency the connectivity of channel sands is reversely proportional to depositional or depressed velocity within the single point bar barrier interbeds dipping toward ox bow lake argillaceous packing zone were developed leading to lateral communication of the lower half part and no communication of the upper half part. Multi component 3D shear wave exploration technique can be used to predict the fracturing direction and density of fractured reservoirs which is very useful to exploration of carbonate pools and coal bed gas pool. The formation mechanism and development characteristic are affected by various geologic factors in cavern pools which can be generally classified into one with lateral communication and the other with lateral restricted communication. The former can also be subdivided into cavern top brecciated fractured reservoirinterval the middle muddy packing barrier interval and the bottom breccia reservoir interval. The continuous emergence and perfection of new techniques about reservoir characterization by seismic interpretation will play an important part in improving the accuracy and effectiveness.
出处
《新疆石油地质》
CAS
CSCD
2000年第5期401-404,共4页
Xinjiang Petroleum Geology
关键词
油藏描述
河道砂
裂缝
溶洞
油气藏
Reservoir description Heterogeneity Channel sands Fracture rock Cave Oil gas reservoir