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The Significance, Method And Technique Of Early Reservoir Description --Exemplified By The Early Reservoir Description In Sidaogou Structure Of Hami Depression

Posted on:2003-11-13Degree:DoctorType:Dissertation
Country:ChinaCandidate:L ZhouFull Text:PDF
GTID:1100360062486589Subject:Mineral prospecting and exploration
Abstract/Summary:PDF Full Text Request
The reservoir description study mainly aimed at the evaluation and the oilfield development stages, and very less focused on the early exploration of reservoirs. But with the increase in the hardness of petroleum exploration ,the experience and lesson in the petroleum exploration history over the world ask to develop early reservoir description in the preparatory reconnaissance stage. It can reduce the risk of exploration and improve the exploration benefit significantly. Therefore by explaining the definition, significance and task of early reservoir description, this paper proposed a systematic thought and method about early reservoir description, and applied in the Sidaogou structure of the Hami Depression. This paper also summarized a way how to do the early reservoir description in the preparatory reconnaissance stage. In the paper author provided a detailed study of sedimentary facies, reservoir, the forming conditions of hydrocarbon pool, structure feature and reservoir prediction about the Sidaogou structure, and point out the primary reason for producing a little oil and gas in the Sidaogou structure ,and gave the main direction for the future petroleum exploration in the Hami Depression. Integrating petroleum geology, reservoir sedimentology, seismic stratigraphy and geophysical exploration method, using the early reservoir description and the reservoir prediction technique, carried through the research.Main researching aspects and achievements of mis paper are described below:(1)This paper summarized and analyzed a lot of petroleum exploration case history in the world , and brought forward a thought of early reservoir description, and demonstrated the concept, task and significance of early reservoir description for the first time, and established a systematic and applied technique and method to develop early reservoir description. The early economic evaluation and oil/gas reservoir damage evaluation are introduced in early petroleum exploration stage in the paper. It is a complementary and perfect on the reservoir description.(2)Analysis for the forming conditions of hydrocarbon pool, structure and reservoir features shows that the Sidaogou structure had two period of migration and accumulation of oil and gas .The first period of migration and accumulation came from the hydrocarbon formed in the source rock of the Sanpu depression and formed the asphalt in the sandstone reservoir of Triassic and Jurassic in the well Ha-2.The second period came from the hydrocarbon formed in the source rock of Triassic round about the well Ha-2 and Ha-3 and formed the hydrocarbon pool in the Sidaogou. The oil-gas in the Sanpu depression had migrated and accumulated on a large scale before the rocks of Ac the Xisanyao Formation of Middle Jurassic was deposited. The direction of migration was in east and northeast.(3)This paper introduced the balanced section into the early reservoir description in the Sidaogou structure for the first time, and gave a new viewpoint that the Sidaogou structure was a fault-bend fold formed by two step thrust fault. The structural stress direction came from the northeast of the Hami Depression. The structural active period was between Jurassic with cretaceous, and stopped in the early Paleogene.(4)This paper shows that the urassic Badaowan Formation in North part of the Hami Depression possesses a depositumal system of fan and fan delta and shallow lake fades with the analysis of seismic stratigraphy.(5)Discovered a abnormal law that the sonic velocity was enlarged with increasing of die core porosity in the sandstone reservoir of the Haojiagou Formation in Triassic, and gave a geologic interpretation about the phenomenon. It was helpful to convert the sonic velocity into die porosity correctly in reservoir.(6)Gave a primary reason for producing a little oil and gas in the well Ha-2 and Ha-3 of the Sidaogou structure. The point of view was an significant improvement to the former view.(7)Provided a standpoint that oil and gas formation of the Sidaogou reservoir...
Keywords/Search Tags:Early Reservoir Description, Reservoir Formation, Reservoir, Alluvial Fan, Fracture, Trap Evaluation, Structure Feature, Seismic Facies, Reservoir Prediction, Turpan-Hami basin, Exploration, Direction
PDF Full Text Request
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