Using hydrocarbon geochemistry, reservoir properties and oil test data, we have studied the oil source conditions, reservoir characteristics, age of formation and oil and gas enrichment rules of the Chang 2 reservoir ...Using hydrocarbon geochemistry, reservoir properties and oil test data, we have studied the oil source conditions, reservoir characteristics, age of formation and oil and gas enrichment rules of the Chang 2 reservoir in the eastern part of Xiao he of the Jingbian Oilfield by using common thin section and fluid inclusions and other technical methods. The results of the study show that: the eastern part of Xiao he area develops Chang 7 high-quality hydrocarbon source rock, its organic carbon is 2.20% on average, the type of organic matter is I-II1 type which is mainly oil-generating, and has reached the stage of a large amount of oil-generating, which can provide the material basis for the formation of the Chang 2 oil reservoir. The physical properties of the Chang 2 reservoir are relatively good, and the reservoir capacity is strong. The type of Chang 2 reservoir is tectonic-lithological composite reservoir;the temperature measurement of reservoir fluid inclusions shows that the reservoir was mainly formed in the middle and late Early Cretaceous period, and the time is about 115 Ma;the distribution and enrichment of the Chang 2 reservoir are mainly controlled by the integrated control of the storage cap layer and the physical properties of the reservoir.展开更多
Located in the middle of the Tarim Basin, Tazhong is a typical area of compound reservoirs rich in oil and gas found in the Carboniferous, Silurian and Ordovician strata. The proved, probable and possible reserves （3...Located in the middle of the Tarim Basin, Tazhong is a typical area of compound reservoirs rich in oil and gas found in the Carboniferous, Silurian and Ordovician strata. The proved, probable and possible reserves （3P reserves） in the area amount to 5×108 tons, so it is of great significance to study the advances and problems in hydrocarbon exploration in the Tazhong area. On the basis of exploration history and analysis of scientific problems, we outline eight achievements： distribution characteristics of reservoirs, stages of reservoir formation, different sources of oil and gas and their respective contributions, the effective regional caprock and reservoir-caprock combinations dominating the vertical distribution of hydrocarbon reservoirs, the control of the Tazhong Palaeo-uplift on reservoir formation and establishing geologic models, structure balance belts influencing the reconstruction and residual potential of reservoirs after accumulation, the rules and mechanisms of fractures controlling oil and gas, and the types of favorable reservoirs and their characteristics of controlling oil and gas distribution. We further point out the main problems about the oil and gas exploration in the Tazhong area and put forward some relevant proposals.展开更多
文摘Using hydrocarbon geochemistry, reservoir properties and oil test data, we have studied the oil source conditions, reservoir characteristics, age of formation and oil and gas enrichment rules of the Chang 2 reservoir in the eastern part of Xiao he of the Jingbian Oilfield by using common thin section and fluid inclusions and other technical methods. The results of the study show that: the eastern part of Xiao he area develops Chang 7 high-quality hydrocarbon source rock, its organic carbon is 2.20% on average, the type of organic matter is I-II1 type which is mainly oil-generating, and has reached the stage of a large amount of oil-generating, which can provide the material basis for the formation of the Chang 2 oil reservoir. The physical properties of the Chang 2 reservoir are relatively good, and the reservoir capacity is strong. The type of Chang 2 reservoir is tectonic-lithological composite reservoir;the temperature measurement of reservoir fluid inclusions shows that the reservoir was mainly formed in the middle and late Early Cretaceous period, and the time is about 115 Ma;the distribution and enrichment of the Chang 2 reservoir are mainly controlled by the integrated control of the storage cap layer and the physical properties of the reservoir.
基金supported by the National Basic Research Program of China (973 Program, Grant No. 2006CB202308)
文摘Located in the middle of the Tarim Basin, Tazhong is a typical area of compound reservoirs rich in oil and gas found in the Carboniferous, Silurian and Ordovician strata. The proved, probable and possible reserves （3P reserves） in the area amount to 5×108 tons, so it is of great significance to study the advances and problems in hydrocarbon exploration in the Tazhong area. On the basis of exploration history and analysis of scientific problems, we outline eight achievements： distribution characteristics of reservoirs, stages of reservoir formation, different sources of oil and gas and their respective contributions, the effective regional caprock and reservoir-caprock combinations dominating the vertical distribution of hydrocarbon reservoirs, the control of the Tazhong Palaeo-uplift on reservoir formation and establishing geologic models, structure balance belts influencing the reconstruction and residual potential of reservoirs after accumulation, the rules and mechanisms of fractures controlling oil and gas, and the types of favorable reservoirs and their characteristics of controlling oil and gas distribution. We further point out the main problems about the oil and gas exploration in the Tazhong area and put forward some relevant proposals.
