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2008 Vol. 19, No. 6

Display Method:
Geodynamic Indications on Igneous Rocks of Transitory Geologic Setting during the LateHercynian in North Tarim Basin
汤良杰, 黄太柱, 崔泽宏, 杨素举, 朱毅秀, 金仙梅
2008, 10(6)
Abstract:
Basic and intermediate-acidic igneous rocks were developed during the late Hercynian in North Tarim basin. The geochemistry characteristics of the rocks show that basic volcanic rock has K2O/Na2O = 0.18–0.61 < 1 and falls into a category of basalt of sodium system. The rocks contain enriched large-ion lithophile elements (LILE) (K, Rb, Ba, Th) and high-field strength elements (HFSE) (Nb, Ta, Ti, Zr, P), with the magmatic material from the upper mantle...
Evidence of Thermal Evolution History ofNortheast Sichuan Basin—(U-Th)/He Low Tem-perature Thermochronometry of Apatite and Zircon
秦建中, 王杰, 邱楠生
2008, 10(6)
Abstract:
(U-Th)/He dating is a newly developed low temperature thermochronometry, and it elaborately reflects cooling history of geologic body under low temperature. It can be applied to analyze thermal evolution of the sedimentary basin, combining with vitrinite reflectance and fission track. (U-Th)/He dating of apatite and zircon from drilling cores in Puguang (普光)-Maoba (毛坝) area and outcrops in Tongjiang (通江) area indicates that the Northeast Sichuan (四川) basin underwent great uplift and denudation during the Tertiary and the Quaternary...
Segment, Linkage, and Extensional Fault-Related Fold in Western Liaodong Bay Subbasin, Northeastern Bohai Sea, China
杨明慧, 周心怀, 魏刚, 刘乐, 李春霞, 郑晓凤, 刘晓健, 高立宝
2008, 10(6)
Abstract:
The western Liaodong (辽东) Bay subbasin displays examples of segment, linkage of extensional fault, and fault-related folds. The Liaoxi (辽西) extensional fault system consists of a series of NNE- and NE-trending segments that were linked through relay ramps. The fault hanging walls are characterized by a series of en echelon synclines with axial traces sub-parallel to the faults...
Fault Characteristics in Longmen Mountain Thrust Belt, Western Sichuan Foreland Basin, China
万桂梅, 汤良杰, 杨克明, 金文正, 吕志洲, 余一欣
2008, 10(6)
Abstract:
Through field geological survey, the authors found that abundant thrust faults developed in the Longmen (龙门) Mountain thrust belt. These faults can be divided into thrust faults and strike-slip faults according to their formation mechanisms and characteristics. Furthermore, these faults can be graded into primary fault, secondary fault, third-level fault, and fourth-level fault according to their scale and role in the tectonic evolution of Longmen Mountain thrust belt...
Effect of Faulting on Ordovician Carbonate Buried-Hill Reservoir Beds in Hetianhe Gas Field, Tarim Basin
吕修祥, 白忠凯, 李建交, 汪伟光, 付辉, 王清华
2008, 10(6)
Abstract:
Ordovician carbonate buried-hill reservoir beds in the Hetianhe (和田河) gas field, located in the Mazhatage (玛扎塔格) structural belt on the southern margin of the Bachu (巴楚) faulted uplift, southwestern Tarim basin, were studied. Based on field survey, core and slice observation, the general characteristics of carbonate buried-hill reservoir beds and specifically Ordovician carbonate buried-hill reservoir beds in the Hetianhe gas field were discussed...
Water Soluble Gas in Deep Carbonate Reservoir, Sichuan Basin, Southwest China
王国芝, 刘树根, 苏文超, 孙玮, 王东, 袁海锋, 徐国盛, 邹灿
2008, 10(6)
Abstract:
Based on temperature and pressure of fluid inclusion, phase of organic inclusion in calcite and quartz filled in vug in the deep carbonate reservoir and the natural gas composition in Weiyuan (威远) gas field in Sichuan (四川) basin, research indicates that water soluble gas exists in deep carbonate reservoir, which reconstructs development and effusion process of water soluble gas...
Main Controlling Factors on Hydrocarbon Accumulation and Distribution in Marine Sedimentary Sequences in South China
Cai Liguo* (蔡立国), Zhou Yan (周雁), Bai Zhenrui (白振瑞)
2008, 10(6)
Abstract:
Multiple source rock assemblages were deposited in the sedimentary provinces in South China in geologic history, and some of them were destructed by and some survived against multiple tectonic movements. Therefore, multiple sources, mixed sources, and uneven distribution of sources occurred in the marine sedimentary basins in South China during the late stage of hydrocarbon pooling...
Sequential Extraction on Oil Sandstones from TZ401 Well—A Case Study on Filling History of Hydrocarbon Reservoir
Pan Changchun* (潘长春), Liu Dayong (刘大永)
2008, 10(6)
Abstract:
Sequential extraction was performed on two oil sandstones from the Upper Carboniferous oil columns of TZ401 well. The free oils of these two oil sandstones and a crude oil from the Lower Carboniferous oil column of this well have low ratios of C28/(C27 + C28 + C29) steranes and gammacerane/C31 hopanes, ranging of 0.11–0.16 and 0.09–0.15, respectively, similar to those from the Middle–Upper Ordovician source rock...
Formation Models and Distribution of Oil and Gas Pools in Tarim Basin, China
Long Shengxiang* (龙胜祥)
2008, 10(6)
Abstract:
This article reports the main formation models and distribution of the oil and gas pools in Tarim basin, China, including (1) occurrence of the found oil and gas pools, (2) main formation models of oil and gas pools, and (3) distribution law of oil/gas pools. Petroleum is distributed widely in the strata of Tarim basin from the Sinian at the bottom to the Neogene at the top...
Mechanism of Secondary Pore Formation and Prediction of Favorable Reservoir of Paleogene in Jiyang Sag, Eastern China
朱筱敏, 陈欢庆, 钟大康, 张琴, 张善文, 吕希学
2008, 10(6)
Abstract:
Jiyang (济阳) sag is an oil rich basin, consisting of Huimin (惠民), Dongying (东营), Zhanhua (沾化), and Chezhen (车镇) depressions. The clastic rock of Paleogene has undergone early and middle diagenetic stages and now the main clastic reservoir is in the middle diagenetic stage...
Hydrocarbon Accumulation Mechanism of Sinian Reservoir in Anpingdian-Gaoshiti Structure, Middle Sichuan Basin
Xu Guosheng* (徐国盛), Mao Min (毛敏), Yuan Haifeng (袁海锋), Liu Shugen (刘树根), Wang Guozhi (王国芝), Zhou Cunjian (周存俭)
2008, 10(6)
Abstract:
The Sinian reservior in Anpingdian (安平店)-Gaoshiti (高石梯) structure, Middle Sichuan (四川) basin, is of great importance to prospect for oil and gas. This article dissects the hydrocarbon accumulation mechanism of this area on the basis of comprehensive methods of organic geochemistry, fluid inclusion, modeling of hydrocarbon generation and expulsion from source rocks, and by combining structure evolutions and analyzing the key geologic features of hydrocarbon origin and trap...
Energy Field Adjustment and Hydrocarbon Phase Evolution in Sinian–Lower Paleozoic, Sichuan Basin
Liu Shugen* (刘树根), Wang Hua (汪华), Sun Wei (孙玮), Wang Guozhi (王国芝), Xu Guosheng (徐国盛), Yuan Haifeng (袁海锋)
2008, 10(6)
Abstract:
The Sinian–Lower Paleozoic (also called the lower association) in Sichuan (四川) basin has undergone geologic evolution for several hundred million years. The subsidence history of the Sinian–Lower Paleozoic can be divided into four stages: the stable subsidence during Cambrian and Silurian; the uplift and denudation during Devonian and Carboniferous; the subsidence (main process) during Permian to Late Cretaceous; and the rapid uplift and denudation since Late Cretaceous. The later two stages could be regarded as critical factors for the development of oil and gas in the lower association...
Paleo-temperature Evolution and Water Soluble Gas in Sinian Reservoir, Anpingdian-Gaoshiti Structural Zone, Central Sichuan Basin
Yuan Haifeng* (袁海锋), Xu Guosheng (徐国盛), Liu Shugen (刘树根), Wang Guozhi (王国芝)
2008, 10(6)
Abstract:
The paleo-temperature evolution of Sinian reservoir of Anping (安平) 1 well was rebuilt by taking the method of apatite fission track and Easy%Ro model. The result of apatite fission track determines the accurate burial history and overcomes the flaw that the vitrinite reflectance is taken as paleo-temperature indicator simply...
Paleo-oil-Water Contact and Present-Day Gas-Water Contact: Implication for Evolution History of Puguang Gas Field, Sichuan Basin, China
李平平, 邹华耀, 张元春, 王存武, 张学丰
2008, 10(6)
Abstract:
The Puguang (普光) gas field is the largest gas field found in marine carbonate in China. The Puguang gas field experienced complicated evolution history from paleo-oil pool to gas pool. The purpose of this article is to reveal the evolution history of Puguang gas field through systematic study on the relationship between paleo-oil-water contact (POWC) and present-day gas-water contact (PGWC). POWC was recognized by observing the change of relative content of residual solid bitumen in the cores, and PGWC was observed using log and drilling stem test data...
Reserve and Pressure Change of Paleo-oil Reservoir in Puguang Area, Sichuan Basin
张元春, 邹华耀, 王存武, 李平平
2008, 10(6)
Abstract:
The Puguang (普光) gas field is the largest gas field found in marine carbonates in China. The Feixianguan (飞仙关) and Changxing (长兴) reservoirs are two such reservoirs that had been buried to a depth of about 7 000 m and experienced maximum temperature of up to 220 ℃ before uplift to the present-day depth of 5 000–5 500 m, with present-day thermal maturity between 2.0% and 3.0% equivalent vitrinite reflectance (Ro). Bitumen staining is ubiquitous throughout the Feixianguan and Changxing formations, with the greatest concentrations in zones with the highest porosity and perme-ability, suggesting that the solid bitumen is the result of in-situ cracking of oil...