Exploration of Reef-Flat Complex Giant Oil-Gas Field in Tazhong No.1 Slope Break in Tarim Basin: Theory and Technology

Abstract

Abstract: To deal with the world-class difficult problems for reef-flat complex (RFC) oil-gas field in Tazhong No.1 slope break, the assorted series of technologies for exploration of the marine carbonate reservoirs are presented, including RFC geologic comprehension modeling technique; RFC quality reservoir seismic prediction technique; RFC large condensate gas pool characterization technique; RFC well location optimum selection technique; super-deep, extra-thermal/pressure reservoir identification, protection and modification technique. The hydrocarbon accumulation geologic theory of RFC large reservoirs is developed, such as the segmentation of platformmargin slope break geologic structure and its control on spatial distribution of RFC, the discovery of largest downhole biohermal group of the Ordovician, the development of large-scale spatial geometry geologic model, the proposition of multi-genetic reservoir improvement, and the development of RFC large condensate gas reservoir geologic models. The deepest and oldest giant condensate gas reservoir in the world has been found out: the RFC giant condensate gas field of the Ordovician is proved as the first one in China, which has reserves of 3×108 t and constructed productivity of 100×104 t in eastern Tarim basin. These exploration and development achievements have enriched the theory and technology for exploration of hydrocarbon accumulation in domestic platform margin energetic facies belts, initiating the novel domains searching for them, being of great significance to be strategically and productively a major explorative area for replacement of resources in Tarim basin.

Key words: Tazhong No.1 slope break, Ordovician, reef-flat complex, hydrocarbon accumulation theory, assorted exploration technology

CLC Number:

TE122.13

YANG Hai-jun, HAN Jian-fa, SUN Chong-hao, ZHANG Hai-zu. Exploration of Reef-Flat Complex Giant Oil-Gas Field in Tazhong No.1 Slope Break in Tarim Basin: Theory and Technology[J]. Xinjiang Petroleum Geology, 2011, 32(3): 224-227.

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