below 3500m) in the Liaohe Basin. According to their forming mechanisms, palaeotectonic settings and sandbody distributions, the sublacustrine fans can be classified into three types, i. e. the gentle-sloped sublacustrine fan, the steep sloped sublacustrine fan and the gravity flow channels. The gentle sloped sublacustrine fan was formed in the deeper water area along the gentle slope side of the depression and was developed with sediment-supplying channels. Its sandbodies were distributed along the short axis. The sediment-supplying channels and the palaeomorphology controlled the distribution pattern of the sub-facies and sandbodies. The steep sloped sublacustrine fan was distributed in the deep-water area and was formed by the sliding of the fan deltas along the eastern boundary fault surface. It has been developed with sandbodies distributed along the long axis. The gravity flow channels was distributed along a fault trough and was formed by two eastern boundary faults Detrital sediments come from the eastern faulting cliff of the depression. This paper has especially studied the depositional characteristics and sandbody spatial distribution of deep reservoirs in the Liaohe Basin. It is indicated that the scales of the deep reservoirs and their petrophysical properties are controlled by the depositional systems and sedimentary facies. The petrophysical properties of the fan deltas are better than those of the sublacustrine fans and the flood plain fluvial channels at the same depth. Similarly, the petrophysical properties of different sub-facies in the same sedimentary facies are also notably different. For in stance, the petrophysical properties of the braided channel sandbody are better than those of the mid fan front and the outer fan of the sublacustrine fans. It is concluded that the petrophysical properties of the fan delta front sandbodies and the braided channel sandbodies of the sublacustrine fans are of the best exploration potential in the deep area of the Liaohe Basin."/>
SEDIMENTARY FACIES OF DEEP BURIAL STRATA OF THE PALAEOGENE CLASTIC RESERVOIRS IN THE LIAOHE BASIN
Abstract The fan-deltas, sublacustrine fans and flood plains constitute the main depositional systems of the Palaeogene of deep burial strata (below 3500m) in the Liaohe Basin. According to their forming mechanisms, palaeotectonic settings and sandbody distributions, the sublacustrine fans can be classified into three types, i. e. the gentle-sloped sublacustrine fan, the steep sloped sublacustrine fan and the gravity flow channels. The gentle sloped sublacustrine fan was formed in the deeper water area along the gentle slope side of the depression and was developed with sediment-supplying channels. Its sandbodies were distributed along the short axis. The sediment-supplying channels and the palaeomorphology controlled the distribution pattern of the sub-facies and sandbodies. The steep sloped sublacustrine fan was distributed in the deep-water area and was formed by the sliding of the fan deltas along the eastern boundary fault surface. It has been developed with sandbodies distributed along the long axis. The gravity flow channels was distributed along a fault trough and was formed by two eastern boundary faults Detrital sediments come from the eastern faulting cliff of the depression. This paper has especially studied the depositional characteristics and sandbody spatial distribution of deep reservoirs in the Liaohe Basin. It is indicated that the scales of the deep reservoirs and their petrophysical properties are controlled by the depositional systems and sedimentary facies. The petrophysical properties of the fan deltas are better than those of the sublacustrine fans and the flood plain fluvial channels at the same depth. Similarly, the petrophysical properties of different sub-facies in the same sedimentary facies are also notably different. For in stance, the petrophysical properties of the braided channel sandbody are better than those of the mid fan front and the outer fan of the sublacustrine fans. It is concluded that the petrophysical properties of the fan delta front sandbodies and the braided channel sandbodies of the sublacustrine fans are of the best exploration potential in the deep area of the Liaohe Basin.
About author: Ren Zuowei, born in 1963, graduated from the Geology Department of Qingdao Ocean University in 1988. Now he is a senior engineer at Research Institute of Exploration and Development of Liaohe Oil Company, CNPC, and a candidate for Ph D. of Nanjing University, and mainly engaged in petroleum geology and exploration research.
Cite this article:
Ren Zuowei,Li Lin,Zhang Fenglian. SEDIMENTARY FACIES OF DEEP BURIAL STRATA OF THE PALAEOGENE CLASTIC RESERVOIRS IN THE LIAOHE BASIN[J]. JOPC, 2001, 3(4): 85-94.
Ren Zuowei,Li Lin,Zhang Fenglian. SEDIMENTARY FACIES OF DEEP BURIAL STRATA OF THE PALAEOGENE CLASTIC RESERVOIRS IN THE LIAOHE BASIN[J]. JOPC, 2001, 3(4): 85-94.
