塔里木盆地奥陶系台缘类型及其储层发育程度的差异性

doi:10.3969/j.issn.1673-8926.2011.05.001

Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (5): 1-4.doi: 10.3969/j.issn.1673-8926.2011.05.001

Relationship between Ordovician platform margin types and reef-shoal reservoirs in Tarim Basin

ZHENG Xingping^1，2， PAN Wenqing^2，3， CHANG Shaoying^1，2， SHEN Anjiang^1，2

1. Research Institute of Petroleum Exploration & Development-Hangzhou， PetroChina， Hangzhou 310023， China； 2. Key Laboratory of Carbonate Reservoirs， CNPC， Hangzhou 310023， China； 3. Tarim Oilfield Company， PetroChina， Kolra 841000， China

Online:2011-10-20 Published:2011-10-20

Abstract

Abstract:

Multiple platform margins developed in Ordovician in TarimBasin, but their reservoirs have significant differences. Statistics data show that reservoir performance of high-angle platform margin is much better than lower-angle platform margin in the aspects of thin section, porosity and logging scales. The angle of foreslope has a positive correlation with the reservoir-layer thickness ratio in platform margin reservoir. High-angle platform margin reef-shoal suffered intense exposure and meteoric water leaching and early pores is favorable for later burial dissolution. So the reservoirs in highangle platform margin reef-shoal have the characteristics of larger thickness and good quality. Low-angle platform margin reef-shoal needs additional conditions to develop good reservoirs, such as fracture, hydrothermal fluid and dolomitization.

Key words: platformmargin, reservoirs, reef-shoal, slope, angle, reservoir-layer thickness ratio, TarimBasin

ZHENG Xingping， PAN Wenqing， CHANG Shaoying， SHEN Anjiang. Relationship between Ordovician platform margin types and reef-shoal reservoirs in Tarim Basin[J].Lithologic Reservoirs, 2011, 23(5): 1-4.

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