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Cracking conditions of crude oil under different geological environments

Science china Earth Sciences 2008年第S1期51卷 77-83页

作者： ZHAO WenZhi,WANG ZhaoYun,ZHANG ShuiChang&WANG HongJun Research institute of petroleum {2.&development,Petrochina,Beijing 100083,china Petrochina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China

There are mainly 3 kinds of existing states of oil generating from source rocks,that is,dispersive liquid hydrocarbon inside of source rock,dispersive liquid hydrocarbon outside of source rock and concentrated liquid hydrocarbon outside of source *** of the differences in thermal history and medium conditions around,and the interaction of organic and inorganic matter,the liquid hydrocarbon with 3 kinds of existing state has different cracking *** gas generation dynamics experiments of crude oil matching different mediums indicate that the distribution of activation energy of methane changes a lot according to medium *** carbonate has a main influence on oil cracking conditions and can largely reduce its activation energy,which reflects the lower cracking temperature of crude *** mudstone takes a second place and the sandstone is the *** catalytic cracking function to the oil of the carbonate,of the mudstone and of the sandstone changes weaken in *** corresponding Ro values of main gas generation period in different mediums are as follows:1.5%―3.8%with pure crude oil,1.2.―3.2.with dispersive crude oil in carbonate,1.3%~3.4% with dispersive crude oil in mudstone and 1.4%―3.6%with dispersive crude oil in *** influence of pressure to crude oil cracking is relatively *** the low heating speed condition, pressure restrains the oil cracking and gas generation,but in the high heating speed condition,pressure has an indistinctive influence to the oil cracking and gas *** also makes a different effort in different evolvement *** the middle and lower Cambrian source rocks in the tarim Basin as an example,primary oil generating quantity is 2.32.2.×10 8 t,residual oil and oil cracking gas quantity is 806.2.×10 8 t and 106.95×10 12.m 3 respectively.

关键词： different existing state oil cracking condition gas source rock kitchen of oil cracking type

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High-Resolution Transgressive-Regressive Sequence Stratigraphy of Chang 8 Member of Yanchang Formation in Southwestern Ordos Basin,Northern china

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Journal of Earth Science 2010年第4期21卷 423-438页

作者：吕明胜陈开远薛良清衣丽萍朱红涛 Research institute of petroleum {2. & development PetroChina School of Energy Resources China University of Geosciences china National Oil and Gas exploration and {2. Corporation Faculty of Earth Resources China University of Geosciences

The reservoirs within the Chang 8 Member of Yanchang(延长) Formation in the southwestern Ordos basin are characterized by low *** is significant to build a high-resolution sequence stratigraphic framework for the exploration and development of these *** on an integrated investigation of well logs,seismic data,cores and outcrops,the Chang 8 Member is interpreted as a 3rd-order transgressive-regressive(T-R) sequence,which consists of six 4th-order T-R sequences,namely,K1,K2.K3,K4,K5 and K6,respectively,from base to *** 4th-order sequence comprises a transgressive systems tract overlain by a regressive systems *** K1 to transgressive systems tract of K4,it is characterized by the landward shifts of facies and overall retrogradational sequence stacking pattern due to accommodation increase more than sediment supply during the 3rd-order base-level *** distributary channels are mainly deposited in the transgressive systems tracts,and the interdistributary bays,sheet sands,and small-scale mouth bars are primarily developed in the regressive systems tracts in response to the 4th-order base-level *** the regressive systems tracts of K4 to K6,it is characterized by the basinward shifts of facies and overall progradational sequence stacking pattern because of accommodation increase less than sediment supply during a fall in 3rd-order base *** distributary channels are mainly accumulated in the transgressive systems tracts,and distributary channels and mouth bars are deposited in the regressive systems tracts as a result of the 4th-order base-level *** stratigraphic and sedimentological analyses indicate that sequences K1,K2.K5 and K6,as well as the basin edge of K3 and K4,remain potential for exploration and development due to their high reservoir quality in response to the low accommodation and more sediment supply.

关键词： transgressive-regressive sequence base level sediment supply sequence stratigraphic framework Ordos basin.

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GENETIC　CLASSIFICATION　AND　DISTRIBUTION　CHARACTERISTICS　OF　CONTINENTAL　petroleum　SYSTEMS　IN　china

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石油勘探与开发 1996年第1期23卷 92-98页

作者： Don Lirong Li Wei Fang Xiang(Pesearch institute of petroleum {2. and development, CNPC, Beijing 100083, P. R. china)

ＧＥＮＥＴＩＣＣＬＡＳＳＩＦＩＣＡＴＩＯＮＡＮＤＤＩＳＴＲＩＢＵＴＩＯＮＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＣＯＮＴＩＮＥＮＴＡＬＰＥＴＲＯＬＥＵＭＳＹＳＴＥＭＳＩＮＣＨＩＮＡ￥ＤｏｎＬｉｒｏｎｇ；ＬｉＷｅｉ；Ｆａｎｇ... 详细信息

ＧＥＮＥＴＩＣＣＬＡＳＳＩＦＩＣＡＴＩＯＮＡＮＤＤＩＳＴＲＩＢＵＴＩＯＮＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＣＯＮＴＩＮＥＮＴＡＬＰＥＴＲＯＬＥＵＭＳＹＳＴＥＭＳＩＮＣＨＩＮＡ￥ＤｏｎＬｉｒｏｎｇ；ＬｉＷｅｉ；ＦａｎｇＸｉａｎｇ（ＰｅｓｅａｒｃｈＩｎｓ...

关键词： petroleum province petroleum supersystem petroleum system Continental sedimentary basin china

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The Isotope Geochemistry of N2. in Natural Gas Pools

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沉积学报 1999年第2期 153-159页

作者： ZHU Yue nian 1 SHI Bu qing 1 FANG Chao bin 2. 1 ( institute of petroleum Resources & Environmental Geology,petroleum University, Dongying 2.7062.Shandong,china) 2.(exploration & development Scientific Research institute,china Offshore Oil Nanh

ＩＮＴＲＯＤＵＣＴＩＯＮＭｏｌｅｃｕｌａｒｎｉｔｒｏｇｅｎ（Ｎ２）ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｃｏｍｍｏｎｎｏｎｈｙｄｒｏｃａｒｂｏｎｃｏｍｐｏｎｅｎｔｓｉｎｇａｓｐｏｏｌｓ（Ｚｈｕ，１９９４）．Ｎ２ｒｉｃｈｇａ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＭｏｌｅｃｕｌａｒｎｉｔｒｏｇｅｎ（Ｎ２）ｉｓｏｎｅｏｆｔｈｅｍｏｓｔｃｏｍｍｏｎｎｏｎｈｙｄｒｏｃａｒｂｏｎｃｏｍｐｏｎｅｎｔｓｉｎｇａｓｐｏｏｌｓ（Ｚｈｕ，１９９４）．Ｎ２ｒｉｃｈｇａｓｐｏｏｌｓｈａｖｅｂｅｅｎｄｉ...

关键词： nitrogen isotope origin of nitrogen natural gas ammomia sedimentary organic matter

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Diagenesis and Restructuring Mechanism of Oil and Gas Reservoir in the Marine Carbonate Formation,Northeastern Sichuan:A Case Study of the Puguang Gas Reservoir

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1173-1181页

作者： DU Chunguo1, 2. WANG Jianjun1, ZOU Huayao2. ZHU Yangming3 and WANG Cunwu4 1 Research institute of petroleum {2. and development, Beijing 100034, china 2.petroleum University of china, Beijing 102.49, china 3 Department of Earth Science, Zhejiang University, Hangzhou 31002., china 4 Faculty of Earth Resources, china University of Geosciences, Wuhan 430074, china Faculty of Earth Resources China University of Geosciences Wuhan 430074 China

Based on the technology of balanced cross-section and physical simulation experiments associated with natural gas geochemical characteristic analyses, core and thin section observations, it has been proven that the Puguang gas reservoir has experienced two periods of diagenesis and restructuring since the Late Indo-Chinese epoch. One is the fluid transfer controlled by the tectonic movement and the other is geochemical reconstruction controlled by thermochemical sulfate reduction (TSR). The middle Yanshan epoch was the main period that the Puguang gas reservoir experienced the geochemical reaction of TSR. TSR can recreate the fluid in the gas reservoir, which makes the gas drying index higher and carbon isotope heavier because C2. (ethane and heavy hydrocarbon) and 12. (carbon 12.isotope) is first consumed relative to CH4 and 13C (carbon 13 isotope). However, the reciprocity between fluid regarding TSR (hydrocarbon, sulfureted hydrogen (H2.) , and water) and reservoir rock results in reservoir rock erosion and anhydrite alteration, which increases porosity in reservoir, thereby improving the petrophysical properties. Superimposed by later tectonic movement, the fluid in Puguang reservoir has twice experienced adjustment, one in the late Yanshan epoch to the early Himalayan epoch and the other time in late Himalayan epoch, after which Puguang gas reservoir is finally developed.

关键词： diagenesis and restructuring mechanism marine carbonate formation thermochemical sulfate reduction Puguang gas reservoir

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A Study of Sedimentary Environment and Reservoir Quality of the Carboniferous Donghe Sandstonein the tarim Basin

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Acta Geologica Sinica(English Edition) 1996年第4期70卷 395-406,454页

作者： Gu JiayuResearch institute of petroleum {2. and development, Beijing Research institute of petroleum {2. and development Beijing

Very thick, fine-grained quartzose sandstone of the Lower Carboniferous (called the Donghe sandstone) was discovered in Donghe-1 well in the tarim basin. Highly-productive commercial oil and gas flows were obtained when a well completion test was conducted. This important discovery proved that the quartzose sandstone is a prospecting target with good prospects. After that, other two paying oil and gas flows were found in the Lower Carboniferous in the Tazhong-4 and Tazhong-10 structures (Tazhong means central tarim), equivalent to the Donghe sandstone. The Tazhong-4 structural oil field is the biggest oil field ever discovered. Therefore it is of guiding importance in oil and gas {2. to deepen the study of sedimentary and reservoir features and the sedimentary environment of the Donghe sandstone and to build a sedimentary model in order to understand the reservoir distribution pattern.

关键词： Donghe sandstone sedimentary facies sedimentary model tempestite pore type dissolved pore

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The components and carbon isotope of the gases in inclusions in reservoir layers of Upper Paleozoic gas pools in the Ordos Basin,china

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Science china Earth Sciences 2008年第S1期51卷 115-121页

作者： MI JingKui 1 ,DAI JinXing 1 ,ZHANG ShuiChang 1 ,ZHANG WenZheng 2.,GONG Se 1 &LI XianQing 3 1 Research institute of petroleum {2. and development,Petrochina,Beijing 100083,china 2.{2. and development Research institute of Petrochina Changqing Oilfield Company,Xi’an 71002.,china 3 Key Laboratory of Coal Resources,Ministry of Education,china University of Miningand Technology,Beijing 100083,china Petrochina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China Petrochina Changqing Oilfield Co Explorat & Dev Res Inst Xian 710021 Peoples R China china Univ Min & Technol Key Lab Coal Resources Minist Educ Beijing 100083 Peoples R China

The components and carbon isotope of gases in inclusions are one of the most important geochemical indexes for gas *** analysis results of the components and carbon isotope of gases from inclusions in reservoir layers of Upper Palaeozoic gas pools in the Ordos Basin show that most inclusions grown in reservoir sandstone are primary *** is only a little difference about the components and carbon isotope between the well gases and the secondary inclusions *** indicated that the epigenetic change of gas pools is *** difference between the well gases and the secondary inclusions gases is caused by two reasons:(i)The well gases come from several disconnected sand bodies buried in a segment of depth,while the inclusion gases come from a point of depth.(ii)The secondary inclusions trapped the gases generated in the former stage of source rock gas generation,and the well gases are the mixed gases generated in all the *** is irresponsible to reconstruct the palaeo-temperature and palaeo-pressure under which the gas pool formed using carbon dioxide inclusions.

关键词： Ordos Basin Upper Paleozoic inclusion gas components carbon isotope

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Discovery of a Late Permian Angara-Cathaysia mixed flora from Acheng of Heilongjiang,china,with discussions on the closure of the Paleoasian Ocean

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Science china Earth Sciences 2009年第12期52卷 1746-1755页

作者： DENG ShengHui1,2. WAN ChuanBiao3 & YANG JianGuo3 1 Research institute of petroleum {2. and development, Petrochina, Beijing 100083, china 2.State Key Laboratory of Enhanced Oil Recovery, Beijing 100083 china 3 Daqing institute of petroleum {2. and development, Petrochina, Daqing 164712. china Research institute of petroleum {2. and development PetroChina Beijing 100083 China State Key Laboratory of Enhanced Oil Recovery Beijing 100083 China Daqing institute of petroleum {2. and development PetroChina Daqing 164712 China

This work documents a new flora from the Upper Permian Hongshan Formation of Acheng County, Heilongjiang Province, Northwest china. The flora consists of 2. species: Paracalamites sp., Pecopteris tangwangheensis Huang, Callipteris obese Huang, Callipteris shenshuensis Huang, C. tangwangheensis Huang, C. heilongjiangensis Huang, C. zeilleri Zalessky, C. sp., Comia yichunensis Huang, C. tenueaxis Huang, Iniopteris sibirica Zalessky, Supaia teiliensis Huang, Compsopteris tchirkovae Zalessky, C. cf. adzvensis Zalessky, Nilssonia sp. 1, Nil. sp. 2. Taeniopteris cf. densissima Halle, T. cf. nystraemii Halle, T. sp. and Noeggerathiopsis derzavinii Neub. It is dominated by Angara species but mixed with some typical Cathaysian elements. The age of the flora is assigned to late of the Late Permian according to the stratigraphic ranges of the known species and the comparisons of it with the similar floras. The new discovery indicates that the final collision between the North china Plate and Siberian Plate occurred in Late Permian along the Xar Moron River-Changchun-Yanji sutured zone, and the Paleoasian Ocean was finally closed at the end of the Permian.

关键词： Late Permian mixed Angara-Cathaysia flora Paleoasian Ocean plate collision Heilongjiang Province of china

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Mechanism of catalytic hydropyrolysis of sedimentary organic matter with MoS_2

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petroleum Science 2011年第2期8卷 134-142页

作者： He Kun Zhang Shuichang Mi Jingkui Chen Jianping Cheng Lei petroleum Geology Research and Central Laboratory Research Institute of Petroleum Exploration and Development （RIPED） PetroChina Beijing 100083 China CNPC Key Laboratories for petroleum Geochemistry Beijing 100083 China

MoS2.was used as an efficient catalyst for hydropyrolysis （Hypy） of three samples of sedimentary organic matter with different maturities. Through comparison with Soxhlet extraction （SE）, it was found that MoS2.catalytic Hypy can remarkably promote the yields of total chloroform extracts, saturates, aromatics, hopanes and steranes. In addition, the difference of biomarker parameters indicated that isomerization of covalently-bound biomarkers is much more difficult than their free counterparts. Meanwhile, the high conversion of total organic carbon （TOC） in MoS2.catalytic Hypy of organic matter proved that the presence of dispersed molybdenum sulfide accelerated the breaking of C-C bonds and the release of hydrocarbons. To address the catalytic mechanism, a series of control experiments based on free Hypy and catalytic Hypy were conducted. The results showed that the calculated atomic ratio of carbon conversion/hydrogen conversion for catalytic Hypy was much larger than the presumed value of 1/2. indicating that intensive hydrogenation took place and significantly influenced the distribution of liquid products. Analysis of stable hydrogen isotope data, infrared spectra and m/z 83 ion chromatograph of the saturate fraction further confirmed this hypothesis. The difference of S content changing （AS） between catalyst-free Hypy and catalytic Hypy, and the thermal characteristics of the catalyst, indicated that active H2. was definitely generated and it probably initiated free radical reactions in the early stage of hydropyrolysis of organic matter.

关键词： Catalytic hydropyrolysis molybdenum disulfide kerogen coal Soxhlet extraction,biomarkers

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Gas formation mechanism of marine carbonate source rocks in china

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Science china Earth Sciences 2005年第4期48卷 441-453页

作者： ZHAO Wenzhi1, WANG Zhaoyun1, HE Haiqing2. ZHANG Mingjie3, WANG Hongjun1, WANG Yunpeng4 & QIN Yong5 1. Research institute of petroleum {2. & development, Petrochina, Beijing 100083, china 2. Petrochina {2. & Production, Beijing 100011, china 3. Department of Geology, Lanzhou University, Lanzhou 730000, china 4. Guangzhou Geochemical institute, Chinese Academy of Sciences, Guangzhou 510640, china 5. china University of Mining and Technology, Xuzhou 2.1000, china 1. Research institute of petroleum {2. & development 100083 PetroChinaBeijin China 2. Petrochina exploration & Production 100011 Beijing China 3. Department of Geology Lanzhou University 730000 Lanzhou China 4. Guangzhou Geochemical institute Chinese Academy of Sciences 510640 Guangzhou China 5. china University of Mining and Technology 221000 Xuzhou China

By breaking through the conventional ideology on the study of gas-formation mechanism of source rocks which focused on merely the characteristics of source rocks them- selves, and based on the development and distribution characteristics of marine carbonate source rocks in the medium-to-bottom parts of the Chinese superimposed sedimentary basins as well as various processes in the course of gas generation and reservoir forming, the complex hydrocarbon-generating model of carbonates is established. Such a model concerns not only the “three-stage” gas formation characteristics of carbonates, but also the gas generation process due to a thermal cracking of oil and the re-generation process of gas from heated secondary organic matters during the gas-generation and reservoir-forming course. The high-quality hy- drocarbon generating matter of marine carbonate source rocks determined a high gas-oil ratio and tended to form paleo-oil-reservoirs, representing an enrichment process of organic matters. The thermal cracking of oil in palaeo-oil-reservoirs is an important means for the effective forma- tion of gas reservoirs. The secondary organic matters in carbonate reservoirs may regenerate gas after a secondary deep burial, thus becoming an effective gas source.

关键词： carbonate, three-stage hydrocarbon generation, inhibitive effect of maturity, oil-cracking gas, second-ary asphalt gas.

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