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Carbon and hydrogen isotopic characteristics of natural gases from the Luliang and Baoshan basins in Yunnan Province, china

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Science china Earth Sciences 2006年第9期49卷 938-946页

作者： XU Yongchang1, LIU Wenhui2, SHEN Ping1, WANG Wanchun1, WANG Xiaofeng1, Tenger1, YAN Yaomin3.& LIU Ruobin3.1. Lanzhou Center of Oil & Gas Resources, institute of Geology and Geophsics, Chinese Academy of Sciences, Lanzhou 73.000, china 2. research institute of petroleum Exploration and production, sinopec, beijing 100083, china 3. South Branch of petroleum Exploration and production Company, sinopec, Kuming 650000, china 1. Lanzhou Center of Oil & Gas Resources Institute of Geology and Geophsics Chinese Academy of Sciences Lanzhou 730000 China 2. research institute of petroleum Exploration and {3. SINOPEC Beijing 100083 China 3. South Branch of petroleum Exploration and production Company SINOPEC Kuming 650000 China

The Luliang and Baoshan basins of Yunnan Province are two small-sizedcontinental oil/gas-bearing sedimentary basins, which were developed at the bases of theCarboniferous and Devonian systems during the Late Tertiary, covering an area of 3.5 km^2 and 254km^2, respectively. Since the 1990s, there have been discovered small-sized natural gas pools inthese two basins. The natural gases are composed mainly of hydrocarbon gases, with nonhydrocarbonsaccounting for less than 2%. Of the hydrocarbon gases, methane accounts for more than 99%, and thecomponents above C_2 account for less than 0.2%. On the basis of previous studies of geologicalbackground, the composition of natural gases and their carbon isotopic composition, it has beendefined that these two gas pools are of bacterial origin. In this work we have comprehensivelymeasured the carbon and hydrogen isotopic composition of natural gases from these two basins andhave gone into the details of the mechanism of gas generation. The δ^(13.C_1 values of naturalgases from the Luliang Basin are within the range of -72.1 per thousand - -73.3.per thousand, andthe δD_(CH_4) values, -242 per thousand - -23. per thousand, indicating that the bacterial gasgeneration is dominated by the way of CO_2 reduction. It has been evidenced that undercontinental-facies fresh water conditions there did occur the CO_2 reduction as a process ofbacterial gas generation. The δ^(13.C_1 values of natural gases from the Baoshan Basin are withinthe range of - 62.5 per thousand - -63.5 per thousand, and the δD_(CH_4) values, -252 per thousand- -260 per thousand. These isotopic characteristics are fallen into transitional phase of acetatefermentation and CO_2 reduction as defined by Whiticar et al. (1986). An important discovery in theLuliang Basin is the carbon isotopic composition of ethane of purely biogenetic origin, i.e., itsδ^(13.C_2 values are within the range of - 61.2 per thousand - - 66.0 per thousand. These carbonisotopic values have been r

关键词： bacterial gas, carbon and hydrogen isotope, CO2 reduction, acetate fermentation.

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Review and Comprehensive Analysis of Composition and Origin of High Acidity Crude Oils

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china petroleum Processing & Petrochemical Technology 2011年第1期13卷 6-15页

作者： Cai Xinheng Tian Songbai (research institute of petroleum Processing,{3.,beijing 100083.china) sinopec Res Inst Petr Proc Beijing 100083 Peoples R China

High acidity crude oils have an advantage over normal oils in terms of their price,but can cause corrosion and refinery *** are the so-called opportunity crudes and likely to be important reserved resources in the 21st *** on high acidity crude oils are becoming more and more *** on the existing research achievements,this article has given an overview of the chemical composition and acid distribution of high acidity oils,and also analyzed their origin types and potential influence factors.

关键词： high acidity oils total acid number acid composition origin influence factors

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Effect of Diesel Fuel Composition on Exhaust Emissions

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china petroleum Processing & Petrochemical Technology 2009年第4期11卷 42-47页

作者： Shen Yanjin (sinopec research institute of {3. Processing,beijing 100083) sinopec research institute of {3. Processing Beijing 100083 China

In this paper,the influence of aromatic content,one of main fuel properties,on diesel particulate emissions was studied at five steady-state operating conditions using a heavy-duty Perkins 4.23. *** analysis of the particulate showed the presence of biologically active polynuclear aromatic hydrocarbons(PAH) in high *** PAH in liquid fuel are identified to be the dominant source of particulate *** particulates are also considered a potential health hazard because of the presence of PAH in the SOF of the particulates and some of these PAH are known to be carcinogenic.

关键词： exhaust emissions aromatics content particulate soluble organic fraction(SOF) carcinogenic PAH

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Propagation characteristics of converted refracted wave and its application in static correction of converted wave

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Science china Earth Sciences 2008年第S2期51卷 226-232页

作者： LIU Yang1,2 & WEI XiuCheng3.1 State Key Laboratory of petroleum Resource and Prospecting,china University of petroleum,{3. 102249,china 2 CNPC Geophysical Exploration Key Laboratory,china University of petroleum,{3. 102249,china 3.Exploration and production research institute,sinopec,{13. china Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China china Univ Petr CNPC Geophys Explorat Key Lab Beijing 102249 Peoples R China sinopec Explorat & Prod Res Inst Beijing 100083 Peoples R China

Three-component seismic exploration through P-wave source and three-component geophone is an effective technique used in complicated reservoir exploration. In three-component seismic exploration data processing,one of the difficulties is static correction of converted wave. This paper analyzes propagation characteristics of non-converted and converted refracted waves,and discovers a favor-able condition for the formation of converted refracted wave,i.e. the velocity of overlaying medium S wave is much lower than that of underlying medium S wave. In addition,the paper proposes the static correction method of converted wave based on PPS converted refracted wave,and processes the real three-component seismic data with better results of static correction of converted wave.

关键词： PPS converted refracted wave converted wave static correction

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Formation mechanism of carbonate cemented zones adjacent to the top overpressured surface in the central Junggar Basin,NW china

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Science china Earth Sciences 2010年第4期53卷 529-540页

作者： YANG Zhi1,2,ZOU CaiNeng1,3.HE Sheng2,LI QiYan1,HE ZhiLiang3.WU HengZhi5,CAO Feng1,MENG XianLong4,WANG FuRong2 & XIAO Qilin21 State Key Laboratory of EOR,research institute of petroleum Exploration & Development,Petro{3.,beijing 100083.china 2 Key Laboratory of Tectonics and petroleum Resources of Ministry of Education,{3. University of Geosciences,Wuhan 43.074,{3. 3.State Key Laboratory of EOR,research institute of petroleum Exploration & Development,Petro{3.,beijing 100083.china 4 research institute of petroleum Exploration and production,sinopec,beijing 100083.china 5 Southwest Branch Company,sinopec,Chengdu 610051,{3. 1. State Key Laboratory of EOR Research Institute of Petroleum Exploration & Development PetroChina Beijing 100083 China2. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences Wuhan 430074 China3. State Key Laboratory of EOR Research Institute of Petroleum Exploration & Development Petrochina Beijing 100083 China5. Southwest Branch Company SINOPEC Chengdu 610051 China4. Research Institute of Petroleum Exploration and Production SINOPEC Beijing 100083 China

Carbonate cemented zones are normally adjacent to the top overpressured surface in the central Junggar Basin,NW *** carbon and oxygen isotopic compositions and petrological investigations of carbonate cements in the carbonate cemented zones indicate that:(1) carbonate cements are composed dominantly of ferrocalcite,ferroan dolomite,and ankerite;(2) carbonate cements are formed under a high temperature circumstance in the subsurface,and organic fluid migration has an important effect on the formation of them;and(3. carbon and oxygen ions in the carbonate cements migrate from the underlying overpressured *** suggests that the occurrence of carbonate cemented zones in this region results from multiple phases of organic fluid expulsion out of the overpressure compartment through geological *** study provides a plausible mechanism of the formation of carbonate cemented zones adjacent to the top overpressured surface in the clastic sedimentary basins,and has an important implication for understanding the internal correlation between the formation of carbonate cemented zones adjacent to top overpressured surface and geofluids expulsion out of overpressured system.

关键词： carbonate cemented zones formation mechanism stable carbon and oxygen isotopic top overpressured surface central Junggar Basin coal-bearing strata

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Natural gas geochemistry and its origins in Kuqa depression

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Science china Earth Sciences 2008年第S1期51卷 174-182页

作者： LIU QuanYou 1 ,QIN ShengFei 1 ,LI Jian 2 ,LIU WenHui 3.,ZHANG DianWei 3.,ZHOU QingHua 1 &HU AnPing 1 1 research institute of petroleum Exploration and Development,Petro{3.,beijing 100083.china 2 Langfang Branch of research institute of petroleum Exploration and Development,Petro{3.,Langfang 065007,{3. 3.Exploration and production research institute,{13.,beijing 100083.china Petrochina Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China Petrochina Langfang Branch Res Inst Petr Explorat & Dev Langfang 065007 Peoples R China sinopec Explorat & Prod Res Inst Beijing 100083 Peoples R China

According to gas compositional and carbon isotopic measurement of 114 gas samples from the Kuqa depression,accumulation of the natural gases in the depression is dominated by hydrocarbon gases, with high gas dryness(C1/C1-4)at the middle and northern parts of the depression and low one towards east and west sides and southern *** carbon isotopes of methane and its homologues are relatively enriched in 13.C,and the distributive range ofδ13. 1 ,δ13. 2 andδ13. 3.is-3.‰―-3.‰,-22‰―-24‰and-20‰―-22‰,*** general,the carbon isotopes of gaseous alkanes become less negative with the increase of carbon ***δ13. CO2 value is less than-10‰in the Kuqa depression,indicating its organogenic *** distributive range of 3.He/ 4 He ratio is within n×10-8 and a decrease in 3.He/ 4 He ratio from north to south in the depression is *** on the geochemical parameters of natural gas above,natural gas in the Kuqa depression is of characteristics of coal-type gas *** possible reasons for the partial reversal of stable carbon isotopes of gaseous alkanes involve the mixing of gases from one common source rock with different thermal maturity or from two separated source rock intervals of similar kerogen type,multistages accumulation of natural gas under high-temperature and over-pressure conditions,and sufficiency and diffusion of natural gas.

关键词： Kuqa depression natural gas stable carbon isotope gas origin

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Progress and review of the studies on the end-Triassic mass extinction event

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Science china Earth Sciences 2005年第12期48卷 2049-2060页

作者： DENG Shenghui1,2, LU Yuanzheng1,2,3.& XU Daoyi4 1. research institute of petroleum Exploration and Development, {3. 100083, china 2. Key Laboratory of Oil and Gas Reservoir of Petrochina, {3. 100083, china 3. china University of Geosciences, {3. 100083, china 4. institute of Geology, china Earthquake Administration, {3. 100029, china 1. research institute of petroleum Exploration and Development 100083 Beijing China 2. Key Laboratory of Oil and Gas Reservoir of Petrochina 100083 Beijing China 3. china University of Geosciences 100083 Beijing China 4. institute of Geology China Earthquake Administration 100029 Beijing China

The mass extinction at the end-Triassic is one of the five biggest in the Phanerozoic. However,it is the least well understood among these five events, and only till last decade it became a great academic interesting subject to geologists. The evidences for this event come obviously from bivalves, brachiopods, ammonites, corals, radiolaria, ostracods and foraminifera of marine habitats, and plants and tetrapods of terrestrial realm. By contrast, for some of other groups, such as marine gastropods and marine vertebrates, no mass extinction has been recog-nized yet. The extinction event is strongly marked at specific level but shown a complicated situa-tion at generic and family levels. Dramatic changing of the environment, such as the temperature raise due to the greenhouse effect, the marine anoxic habitats caused by a sudden transgression after the regression at the end of Triassic, has been claimed to be the main cause of the extinction. Many hypotheses have been suggested to demonstrate the mechanisms of the environment changing, among which two popular ones are the bolide impact and volcanic eruption. The Triassic-Jurassic (Tr-J) boundary mass extinction event is still poorly understood because no enough data have been obtained from the Tr-J boundary successional sections of both marine and terrestrial sediments, and most of these studies were regionally restricted. The basic aspects of the event and its associated environmental conditions remain poorly characterized and the causal mechanism or mechanisms are equivocal. Some authors even doubt its occurrence. china has many successionally developed terrestrial and marine Tr-J sections. Detailed studies of these sections may be important and significant for well understanding of the event.

关键词： progress, review, end-Triassic, mass extinction, mechanism, Tr-J boundary.

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Study on Application of Novel Flocculating Agent in Treating Refinery Wastewater with High Concentration of Pollutants

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china petroleum Processing & Petrochemical Technology 2009年第2期11卷 57-61页

作者： Zhang Baoji Qin Bing(sinopec research institute of {3. Processing,beijing 100083) sinopec research institute of {3. Processing Beijing 100083 China

After conducting a lot of screening experiments the appropriate flocculating formulations for treating high-concentration wastewater discharged from a certain refinery were selected. The oil removal rate and COD removal achieved by these flocculating formulations were better than that achieved by the conventional compound formulation consisting of polyaluminium chloride(PAC) and polyacrylamide(PAA) . Addition of an oil/water separating agent to the formulation could improve its oil removal performance to facilitate the oil/water separation of the oil-in-water emulsion in the high-concentration wastewater along with improved adaptability of the formulation to the wastewater containing high concentration of pollutants. This flocculating agent has promising prospects for commercial application.

关键词： wastewater pollutants flocculating agent oil/water separation

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Study on MIP Technology for production of EUROⅣClean Gasoline *** of Rules for Transformation of Sulfur Compounds and Factors Influencing Sulfur Content in MIP Naphtha

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china petroleum Processing & Petrochemical Technology 2009年第4期11卷 27-33页

作者： Tang Jinlian Xu Youhao Cheng Congli Wang Xieqing (research institute of petroleum Processing,{3.,beijing 100083.china) research institute of petroleum Processing SINOPEC Beijing 100083 China

The rules of MIP reactions for catalytic cracking of sulfur compounds and its influence on the sulfur content in the MIP naphtha were *** mam factors influencing the sulfur content in the MIP naphtha were thought to be the sulfur content of feedstock and were closely related with the olefin content of *** into account the characteristic features of MIP process,the methods for reducing the sulfur content in the MIP naphtha were comprised of decreasing the sulfur content of feedstock by hydrotreating and decreasing the olefin content of naphtha through promoting hydrogen transfer ***,the EuroⅣclean gasoline with low sulfur content and low olefin content could be obtained directly through the MIP technology.

关键词： FCC MIP process gasoline sulfur content feedstock

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Quantitative studies of hydrocarbon loss of the Silurian bitumen sandstone in the Tarim Basin

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Science china Earth Sciences 2008年第S2期51卷 101-107页

作者： JIANG ZhenXue1,2,PANG XiongQi1,2,LIU LuoFu1,2,WANG XianDong3.ZHANG Jun4 & LI HongYi1,2 1 Basin and Reservoir research Center,china University of petroleum,{3. 102249,china 2 State Key Laboratory of petroleum Resource and Prospecting,china University of petroleum,{3. 102249,china 3.research institute of Exploration and Development,Daqing Oilfield Company Ltd,Daqing 163.12,china 4 petroleum Exploration and production institute of sinopec,beijing 100083.china china Univ Petr Basin & Reservoir Res Ctr Beijing 102249 Peoples R China china Univ Petr State Key Lab Petr Resource & Prospecting Beijing 102249 Peoples R China Daqing Oilfield Co Ltd Res Inst Explorat & Dev Daqing 163712 Peoples R China sinopec Petr Explorat & Prod Inst Beijing 100083 Peoples R China

The evolution of Tarim Basin experienced several tectonic movements,of which Caledonian movement caused a serious damage to reservoirs of Silurian. The earlier reservoirs size and the later hydrocarbon loss are two key factors to exploration prospect of Silurian. On the basis of net thickness of bituminous sandstone and recovery coefficient of crude oil converting to bitumen,the scale of the hydrocarbon loss of palaeo-accumulation in bitumen sandstone of Silurian was calculated (86.3.×108t). The deter-mination of net thickness of bitumen sandstone was completed mainly by several methods,such as physical property demarcation,observing lithology,grains with oil inclusion (GOI) technology,and quantitative grains fluorescence (QGF) technology. The samples of black sandstone and white sand-stone were collected and compared by means of the methods mentioned above. The results showed that there was little hydrocarbon,or none,in the white sandstone. The recovery coefficient was ob-tained by the analyses of plentiful physical parameters of crude oil and bitumen sandstone,based on the hypothesis that nonhydrocarbon compounds and bitumen were invariable in the process of bitu-men forming. The calculated result,which is more scientific and actual,indicates the exploration pros-pect is more promising in Silurian of the Tarim Basin.

关键词： Tarim Basin Silurian bitumen sandstone hydrocarbon loss quantitative research recovery coefficient

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