Reef and beach reservoir has great exploration significance Oil and gas resources are rich in reef reservoir. Statistics of the International Chemistry Industry Association (CIA) in 1977 show that recoverable reserves...Reef and beach reservoir has great exploration significance Oil and gas resources are rich in reef reservoir. Statistics of the International Chemistry Industry Association (CIA) in 1977 show that recoverable reserves of the reefbeach oil and gas fields that have been discovered in展开更多
During the first six months of 2006, PetroChina continued to strengthen the comprehensive management of its mature oilfields and took measures to build capacity at both mature and new oilfields. Aiming to ensure a saf...During the first six months of 2006, PetroChina continued to strengthen the comprehensive management of its mature oilfields and took measures to build capacity at both mature and new oilfields. Aiming to ensure a safe and stable supply at core gas pipeline networks, the company further boosted development of its key gas fields and fortified the coordination between the production, transportation, and marketing operations.展开更多
Deep and ultra-deep drilling technologies have been developed since the late 1930s, and got great achievements especially in the last two decades. The depth of well completion has even reached to 12 kilometers. Severa...Deep and ultra-deep drilling technologies have been developed since the late 1930s, and got great achievements especially in the last two decades. The depth of well completion has even reached to 12 kilometers. Several countries, such as US and some European countries, are leading in the advanced deep and ultra-deep drilling technologies in the world. In recent years, nevertheless, PetroChina has also made big progress in mechanical penetration rate （ROP）, drilling period, amount of drilling bit used in a single well of deep drilling as well as in deep drilling equipments. Compared with the high-level technologies of complicated deep drilling in the world, PetroChina still has a long way to go.展开更多
Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have been discovered in both the Luojiazhai-Puguang and Longgang areas of the Sichuan Basin, but the accumulation scale, abu...Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have been discovered in both the Luojiazhai-Puguang and Longgang areas of the Sichuan Basin, but the accumulation scale, abundance and distribution patterns differ greatly. In fact, the two areas have more differences than they have similarities. Similarities include: (1) the lithology, properties and types of porosity of the reef and oolitic reservoirs are primarily consistent in the two areas; (2) well-developed regional caprocks that seal the fluid system; and (3) accumulation process histories, with liquid hydrocarbon charging at an early stage, cracking into gas at a high to over-mature stage, adjustment of gas reservoirs at an uplifting stage, and final reservoir generation at a late stage. Differences include: (1) gas accumulations in the Luojiazhai-Puguang area that are dominated by oil-type cracked gas, with multiple and sufficient gas sources, contrasting with gas accumulations in the Longgang area that are dominated by coal-sourced gas with insufficient gas sources; (2) heterogeneity and horizontal diversity of reservoirs in the Longgang area that are stronger than in the Luojiazhai-Puguang area; and (3) the development of deep and large faults in the Luojiazhai-Puguang area that link source, reservoir and migration pathways, contrasting with poorly developed faults in Longgang area, where laterally variable fractures are the major migration pathway. Because of these differences, abundant large-scale structurally-controlled gas accumulations are developed in the Luojiazhai-Puguang area, whereas lithology plays a more important role in gas accumulation in the Longgang area where accumulations are smaller-scale and have lower gas-bearing abundance. We suggest that future exploration for reef and oolitic gas accumulations should be strengthened in NE Sichuan and NW Sichuan Jiulongshan. In particular, the transitional zone between Longgang and Kaijiang-Liangping Bay has the best potential for new discoveries.展开更多
文摘Reef and beach reservoir has great exploration significance Oil and gas resources are rich in reef reservoir. Statistics of the International Chemistry Industry Association (CIA) in 1977 show that recoverable reserves of the reefbeach oil and gas fields that have been discovered in
文摘During the first six months of 2006, PetroChina continued to strengthen the comprehensive management of its mature oilfields and took measures to build capacity at both mature and new oilfields. Aiming to ensure a safe and stable supply at core gas pipeline networks, the company further boosted development of its key gas fields and fortified the coordination between the production, transportation, and marketing operations.
文摘Deep and ultra-deep drilling technologies have been developed since the late 1930s, and got great achievements especially in the last two decades. The depth of well completion has even reached to 12 kilometers. Several countries, such as US and some European countries, are leading in the advanced deep and ultra-deep drilling technologies in the world. In recent years, nevertheless, PetroChina has also made big progress in mechanical penetration rate （ROP）, drilling period, amount of drilling bit used in a single well of deep drilling as well as in deep drilling equipments. Compared with the high-level technologies of complicated deep drilling in the world, PetroChina still has a long way to go.
基金supported by the National Basic Research Program of China (2007CB209500)the National Special Program of Science and Technology in China (2008ZX05004)
文摘Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have been discovered in both the Luojiazhai-Puguang and Longgang areas of the Sichuan Basin, but the accumulation scale, abundance and distribution patterns differ greatly. In fact, the two areas have more differences than they have similarities. Similarities include: (1) the lithology, properties and types of porosity of the reef and oolitic reservoirs are primarily consistent in the two areas; (2) well-developed regional caprocks that seal the fluid system; and (3) accumulation process histories, with liquid hydrocarbon charging at an early stage, cracking into gas at a high to over-mature stage, adjustment of gas reservoirs at an uplifting stage, and final reservoir generation at a late stage. Differences include: (1) gas accumulations in the Luojiazhai-Puguang area that are dominated by oil-type cracked gas, with multiple and sufficient gas sources, contrasting with gas accumulations in the Longgang area that are dominated by coal-sourced gas with insufficient gas sources; (2) heterogeneity and horizontal diversity of reservoirs in the Longgang area that are stronger than in the Luojiazhai-Puguang area; and (3) the development of deep and large faults in the Luojiazhai-Puguang area that link source, reservoir and migration pathways, contrasting with poorly developed faults in Longgang area, where laterally variable fractures are the major migration pathway. Because of these differences, abundant large-scale structurally-controlled gas accumulations are developed in the Luojiazhai-Puguang area, whereas lithology plays a more important role in gas accumulation in the Longgang area where accumulations are smaller-scale and have lower gas-bearing abundance. We suggest that future exploration for reef and oolitic gas accumulations should be strengthened in NE Sichuan and NW Sichuan Jiulongshan. In particular, the transitional zone between Longgang and Kaijiang-Liangping Bay has the best potential for new discoveries.
