Editorial office of ACTA PETROLEI SINICA ›› 1983, Vol. 4 ›› Issue (1): 1-10.DOI: 10.7623/syxb198301001

• Petroleum Exploration •     Next Articles

CHARACTERISTICS OF PETROLEUM GCOLOGICAL STRUCTURES IN CHINA AND EVALUATION OF THEIR OIL PROSPECTS

Tien Zaiyi   

  1. Scientific Research Institute of Petroleum Exploration and Development
  • Received:1982-02-25 Online:1983-01-25 Published:2013-07-08

中国石油地质构造特征及油气远景评价

田在艺   

  1. 石油勘探开发科学研究院

Abstract: The oil and gas basins in China are tectonically classified into intracratonic primary basins of marine deposits inside the platform formed in pre-Indo-Chinese movement days and secondary composite superimposed basins of continental deposits formed through internal disintegration of plates during the Meso-Cenozoic eras in post-Indo-Chinese movement time. The former constitutes a kind of stable transitional oil and gas basins of platform type, and the latter basins of varying types in the fault-depressions, depressions, piedmont depressions and intermontane depressions. The control of oil and gas basins over accumulations of oil and gas is reviewed in the following respects: (1) sedimentary basins as the basic structural units for the formation of oil and gas pools; (2) oil and gas accumulations strictly under the control of oil generation centers in depressions; (3) multicyclic nature of deposition of source and reservoir rocks; (4) strict control of sedimentary facies over oil and gas distribution; (5) shallow sea basins favourable for oil generation, platform margin for oil accumulation and storage and platform for oil generation and storage; (6) formation and types of oil and gas pools controlled by the development of basin structures and (7) oil and gas accumulations distributed in rows, zones or in rings. In appraising the perspectivity of the sedimentary basins in China, the author divides the stable platform regions with marine deposits into ten units and the Meso-Cenozoic basins with continental deposits into six units. In his opinion, the continental shelf along the sea coast should take the first place with prospect greater than that of eastern China. The latter ranks next in potentiality and is expected to be able to maintain its present level of production for some time to come provided more detailed work is done. The western part of China stands third on the priority list where exploratory effort should be intensified so that it may get close to eastern China in oil production. In regions covered by paleozoic marine deposits, primary efforts should be directed toward the search of gas, with the search of oil in a subordinate position, paying particular attention to the search of coal-generated gas at the same time.

摘要: 中国含油气盆地大地构造分两个阶段,印支运动以前为地台内部海相沉积内克拉通原生盆地,形成稳定过渡性的地台型含油气盆地。印支运动后的中新生代时期为板块内部解体陆相沉积后生复合迭加盆地,形成不同类型的断陷、拗陷、山前拗陷、山间拗陷含油气盆地。对中国沉积盆地进行含油气性评价时,把古生代海相沉积稳定地台区分为十个评价单元;中新生代陆相沉积盆地可以分为六个评价单元。其含油气远景沿海大陆架是居于首位的,今后发展会超过目前东部地区;东部地区为第二位,在一段时期可以保持当前生产水平,但要做过细的工作;西部地区是第三位的,应当加强勘探工怍,争取接近东部水平。古生代海相沉积区应以找气为主,找油为辅,并重视寻找煤成气。