Arc-shaped Fault Break Slope System and Its Control on Low Stand Systems Sandbodies in Dongying Depression

REN Jian ye; ZHANG Qing lin; LU Yong chao

Arc shaped fault system of Dongying depression is composed of 3 circle belts. Syndepositional faulting in these circle belts caused the development of syndeposotional fault break slope, which further controlled the distribution of subsidence centers, hydrocarbon generating center and sand bodies. Big low stand fan sand bodies that have been found distribute along the circle belts and were controlled by fault break slopes. Thus, important direction of finding new low stand reservoirs should be from fault break slope to sag depression along sequence boundary. Moreover, based on the analysis of hydrocarbon generating dynamics, migration systems and relationship between reservoirs and effective hydrocarbon rocks, two kinds of hydrocarbon accumulation models have been put forward in this paper. The low stand fans in fault break mainly are almost all favorable reservoirs for oil and gas, and show similar dynamic progress of hydrocarbon accumulation.

China University of Geosciences, Wuhan 430074

Received Date: 2004-01-14

Rev Recd Date: 2004-03-09

Publish Date: 2004-12-10

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Abstract: Arc shaped fault system of Dongying depression is composed of 3 circle belts. Syndepositional faulting in these circle belts caused the development of syndeposotional fault break slope, which further controlled the distribution of subsidence centers, hydrocarbon generating center and sand bodies. Big low stand fan sand bodies that have been found distribute along the circle belts and were controlled by fault break slopes. Thus, important direction of finding new low stand reservoirs should be from fault break slope to sag depression along sequence boundary. Moreover, based on the analysis of hydrocarbon generating dynamics, migration systems and relationship between reservoirs and effective hydrocarbon rocks, two kinds of hydrocarbon accumulation models have been put forward in this paper. The low stand fans in fault break mainly are almost all favorable reservoirs for oil and gas, and show similar dynamic progress of hydrocarbon accumulation.

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Arc-shaped Fault Break Slope System and Its Control on Low Stand Systems Sandbodies in Dongying Depression

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