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25-norhopane series in the unbiodegraded oil and the source rocks

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Chinese Science Bulletin 1997年第16期42卷 1388-1391页

作者： BAO JianpingJianghan petroleum institute, Jingsha 434102, china Jianghan petroleum institute Jingsha 434102 China

HOPANOIDS are important constituents of the cell wall of bacteria. As a kind of important biomarkers indicating the bacterial inputs, their diagenetic derivatives are widely distributed in sedimentary records. 25-norhopane series are one type of geohopanoids whose origins and geochemical significances are still in dispute. 25-norhopane is usually used as the reliable indicators of oil biodegradation. In this study 25-norhopane series and 25,

关键词： 25-norhopane series unbiodegraded oil source rocks.

Classification and origin of natural gases from Lishui Sag,the East china Sea Basin

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Science china Earth Sciences 2008年第S1期51卷 122-130页

作者： CHEN JianPing 1,2 ,GE HePing 3 ,CHEN XiaoDong 3 ,DENG ChunPing 1,2 &LIANG DiGang 1,2 1 Research institute of petroleum Exploration&Development,Petrochina,Beijing 100083,china 2 Key Lab of petroleum Geochemistry,CNPC,Beijing 100083,china 3 Shanghai Division,CNOOC,Shanghai 200030,china 1. Research institute of petroleum Exploration & Development PetroChina Beijing 100083 China2. Key Lab of Petroleum Geochemistry CNPC Beijing 100083 China3. Shanghai Division CNOOC Shanghai 200030 China

Natural gases discovered up to now in Lishui Sag,the East china Sea Basin,differ greatly in gaseous compositions,of which hydrocarbon gases amount to 2%―94%while non-hydrocarbon gases are dominated by *** hydrocarbon gases,without exception,contain less than 90%of methane and over 10%of C2 + heavier hydrocarbons,indicating a wet *** isotopic analyses on these hydrocarbon gases showed thatδ13C 1 ,δ13C 2 andδ13C 3 are basically lighter than-44‰,-29‰and-26‰, *** difference in carbon isotopic values between methane and ethane is great,suggesting a biogenic oil-type gas produced by the mixed organic matter at peak generation.δ13C CO2 values of nonhydrocarbon gases are all heavier than-10‰,indicating a typical abiogenic *** simulation experiment on hydrocarbon generation of organic matter in a closed gold-tube system showed that the proportion of methane in natural gases produced by terrigenous organic matter in the Lingfeng Formation marine deposit is obviously higher than that in natural gases derived from the aquatic and terrigenous mixed organic matter in the Yueguifeng Formation lacustrine deposit,consequently the proportion of heavier hydrocarbons of the former is remarkably lower than that of the ***, δ13C 1 values of natural gases produced by terrigenous organic matter in the Lingfeng Formation marine deposit are about 5‰heavier than those of natural gases derived from the aquatic and terrigenous mixed organic matter in the Yueguifeng Formation lacustrine deposit whileδ13C 2 andδ13C 3 values of the former are over 9‰heavier than those of the *** the LS36-1 oil-gas pool is the only commercial oil-gas reservoir in Lishui Sag,where carbon isotopic compositions of various hydrocarbon components differ greatly from those of natural gases produced by the Lingfeng Formation organic matter but are very similar to those of natural gases derived from the Yueguifeng Formation organic matter,therefore,natural gases in the

关键词： Lishui Sag natural gas biogenesis abiogenesis lacustrine source rock marine source rock coal-measures source rock

MULTIPLE FREQUENCIES ESTIMATION OF SIGNAL WITH SUB-SAMPLING

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Journal of Electronics(china) 1998年第3期15卷 233-239页

作者： Tang Bin(southwestern petroleum institute, nanchong 637001)Xiao Xianci(University of Electronic and Science Technology of china, Chengdu 610054)

Based on time delay technology and MUSIC algorithm, a novel estimating multiple frequencies approach of signal with sampling rate which is least Nyquist sampling rate is presented in this paper. With choosing delay ti... 详细信息

关键词： Sub-sample Frequency Time delay MUSIC algorithm

Geochemical characteristics and origin of gases from the Upper,Lower Paleozoic and the Mesozoic reservoirs in the Ordos Basin,china

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Science china Earth Sciences 2008年第S1期51卷 183-194页

作者： HU AnPing 1 ,Li Jian 2 ,ZHANG WenZheng 3 ,LI ZhiSheng 2 ,HOU Lu 4 &LIU QuanYou 5 1 Department of Earth Sciences,Zhejiang University,Hangzhou 310027,china 2 Langfang Branch,Reasearch institute of petroleum Exploration and Development,Petrochina,Langfang 065007,china 3 institute of Exploration and Development,Petrochina Changqing Oilfield Company,Xi’an 710021,china 4 University of petroleum,Beijing102249,china 5 Petrochina Research institute of petroleum Exploration and Development,Beijing 100083,china 1. Department of Earth Sciences Zhejiang University Hangzhou 310027 China2. Langfang Branch Reasearch Institute of Petroleum Exploration and Development PetroChina Langfang 065007 China3. Institute of Exploration and Development PetroChina Changqing Oilfield Company Xi’an 710021 China4. University of Petroleum Beijing 102249 China5. PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083 China

The Ordos Basin,the second largest sedimentary basin in china,contains the broad distribution of natural gas *** far,several giant gas fields have been discovered in the Upper and Lower Paleozoic in this basin,each having over 1000×10 8 m 3 of proven gas reserves,and several gas pools have also been discovered in the *** paper collected the data of natural gases and elucidated the geochemical characteristics of gases from different reservoirs,and then discussed their *** hydrocarbons preserved in the Upper Paleozoic,the elevatedδ13C values of methane,ethane and propane indicate that the gases would be mainly coal-formed gases;the singular reversal in the stable carbon isotopes of gaseous alkanes suggests the mixed gases from humic sources with different *** the Lower Paleozoic,theδ13C 1 values are mostly similar with those in the Upper Paleozoic,but theδ13C 2 andδ13C 3 values are slightly lighter,suggesting that the gases would be mixing of coal-type gases as a main member and oil-type *** are multiple reversals in carbon isotopes for gaseous alkanes,especially abnormal reversal for methane and ethane(i.e.δ13C 1 >δ13C 2 ),inferring that gases would be mixed between high-mature coal-formed gases and oil-type *** the Mesozoic,the δ13Cvalues for gaseous alkanes are enriched in 12C,indicating that the gases are mainly derived from sapropelic sources;the carbon isotopic reversal for propane and butane in the Mesozoic is caused by microbial oxidation and mixing of gases from sapropelic sources with different *** contrast to the Upper Paleozoic gases,the Mesozoic gases are characterized by heavier carbon isotopes of iso-butane than normal butane,which may be caused by gases generated from different kerogen types. Finally,according toδ13C 1 -Ro relationship and extremely low total organic carbon contents,the Low Paleozoic gases would not be generated from the Ordovician source as a main gas source,bycontrast, the Upper Pale

关键词： Ordos Basin natural gas chemical composition carbon isotope genesis

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下部钻柱组合的变形及应力研究

石油学报 2002年第4期23卷 93-96页

作者：石晓兵施太和王敬浩贾华明西南石油学院石油工程系四川南充637001 塔里木油田分公司新疆库尔勒841000

应力集中是钻具疲劳破坏的一个关键因素 ,定量计算钻具在井下所承受的应力水平及其分布规律显得尤为重要。建立了带扶正器下部钻具组合在垂直井和斜直井眼中的有限元力学模型 ,用编制的软件求解并得到了下部钻具组合的形变和弯曲应力。... 详细信息

应力集中是钻具疲劳破坏的一个关键因素 ,定量计算钻具在井下所承受的应力水平及其分布规律显得尤为重要。建立了带扶正器下部钻具组合在垂直井和斜直井眼中的有限元力学模型 ,用编制的软件求解并得到了下部钻具组合的形变和弯曲应力。揭示了下部钻具组合失效的力学机理。下部钻柱组合在长跨距内变形挠度最大。钻柱变形后 ,危险点不在挠度最大处 ,而在钻柱变形转角大的位置。在扶正器附近的转角大 ,因而弯矩也大。扶正器附近是应力集中区 ,而远离扶正器的两跨之间应力水平相对较低。从钻具的结构上看 ,钻具的连接螺纹正处在这些最大应力集中区 ,这是连接螺纹疲劳失效的根本原因 ,而扶正器或配合接头的失效多发生在连接螺纹部位。

关键词：钻具组合扶正器有限元法变形应力计算模型

Study on forward modeling of through-casing resistivity logging

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Science china Earth Sciences 2008年第S2期51卷 207-211页

作者： GAO Jie1,LIU FuPing2,BAO DeZhou3,CHENG Xi3 & ZHANG YuLing4 1 china University of petroleum,Beijing 102249,china 2 Beijing institute of Graphic Communication,Beijing 102600,china 3 china petroleum Logging CO. LTD.,Xi’an 710021,china 4 china National Logging Corporation,Beijing 100101,china china Univ Petr Beijing 102249 Peoples R China Beijing Inst Graph Commun Beijing 102600 Peoples R China china Petr Logging CO LTD Xian 710021 Peoples R China china Natl Logging Corp Beijing 100101 Peoples R China

Through-casing resistivity logging (TCRL) is a new kind of logging method for formation evaluation,reservoir monitoring and saturation changes tracking. In this paper,the basic principle of TCRL is de-tailed,and the modified transmission line equation method (MTLEM) is first proposed in china. The MTLEM has been employed to simulate the responses of TCRL,on the basis of which,the effects of formation resistivity,cement and casing on the responses of TCRL are analyzed,and the signals in-duced in different formations are also calculated,which can help the design of TCRL tool and data processing and interpretation in china.

关键词： through-casing resistivity logging (TCRL) modified transmission line equation method (MTLEM) casing cement sheath

A Study of Laminar-cementing Displacement Model for Horizontal Well

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china Oil & Gas 1996年第1期3卷 38-39页

作者： Zheng Yonggang Hao Junfang(University of petroleum,Dongying)(southwest petroleum institute,nanchong) University of petroleum Dongying southwest petroleum institute Nanchong

ＡＳｔｕｄｙｏｆＬａｍｉｎａｒ－ｃｅｍｅｎｔｉｎｇＤｉｓｐｌａｃｅｍｅｎｔＭｏｄｅｌｆｏｒＨｏｒｉｚｏｎｔａｌＷｅｌｌＺｈｅｎｇＹｏｎｇｇａｎｇ；ＨａｏＪｕｎｆａｎｇ（ＵｎｉｖｅｒｓｉｔｙｏｆＰｅｔｒｏｌｅｕｍ，Ｄｏ... 详细信息

ＡＳｔｕｄｙｏｆＬａｍｉｎａｒ－ｃｅｍｅｎｔｉｎｇＤｉｓｐｌａｃｅｍｅｎｔＭｏｄｅｌｆｏｒＨｏｒｉｚｏｎｔａｌＷｅｌｌＺｈｅｎｇＹｏｎｇｇａｎｇ；ＨａｏＪｕｎｆａｎｇ（ＵｎｉｖｅｒｓｉｔｙｏｆＰｅｔｒｏｌｅｕｍ，Ｄｏｎｇｙｉｎｇ）（Ｓｏｕｔｈｗｅｓｔ...

关键词： Horizontal well Cementing Model

Hydrocarbon test in lower-layer atmosphere to predict deep-sea petroleum or hydrate in the Okinawa Trough: an example

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Acta Oceanologica Sinica 2003年第4期22卷 569-576页

作者： Gong Jianming1, Chen Jianwen 1, 2, Li Gang1, Zhang Xunhua1, Li Jipeng3, Huang Fulin1 1. Qingdao institute of Marine Geology, Qingdao 266071, china. 2. Ocean University of china, Qingdao 266003, china 3. Hefei institute of petroleum Chemical Exploration, china petroleum Exploration and Development Research institute, Hefei 230022,china Qingdao Inst Marine Geol Qingdao 266071 Peoples R China Ocean Univ china Qingdao 266003 Peoples R China china Petr Explorat & Dev Res Inst Hefei Inst Petr Chem Explorat Hefei 230022 Peoples R China

Light hydrocarbon (methane, ethane, propane, butane and CO2) test and C isotopic analysis of CO are conducted for over 100 lower-layer atmospheric samples from the East china Sea slope and the Okinawa Trough. The results show that the lower-layer atmosphere mainly consists of CO2 and then of CH4, and the CO2 concentrations are calculated to have a high average value of 0.87 omega/10(-2) about three times that of the regional background (0-3 omega/10(-2)). The result also shows that the average value of C isotope - 20.8 x 10(-3) is given to the CO2, inferring that it is inorganic gas. Thus, for the future 's work in the Okinawa Trough, special attention should be paid to CO2 hydrate, which is very possibly an important hydrate type.

关键词： lower-layer atmosphere hydrocarbon test C isotopic analysis deep-sea petroleum gas hydrate

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牙齿过盈配合接触问题的计算机模拟研究

石油学报 2002年第2期23卷 97-100页

作者：练章华唐波等西南石油学院烷井中心，四川南充637001

用弹塑性接触有限元法 ,建立了牙齿与牙轮体孔眼过盈配合的有限元力学模型 ,用ANSYS5 5 1软件为计算机仿真模拟器 ,分析了牙齿压入孔眼的全过程 ,并根据孔眼的过盈量值 ,反算出了不同时刻需要在牙齿上施加的动态载荷。详细地分析了孔... 详细信息

用弹塑性接触有限元法 ,建立了牙齿与牙轮体孔眼过盈配合的有限元力学模型 ,用ANSYS5 5 1软件为计算机仿真模拟器 ,分析了牙齿压入孔眼的全过程 ,并根据孔眼的过盈量值 ,反算出了不同时刻需要在牙齿上施加的动态载荷。详细地分析了孔眼壁附近的等效应力随牙齿压入深度的变化关系。结果表明 ,过盈量超过 0 0 35mm时 ,牙轮体内开始出现塑性变形。计算机模拟实验结果为实际压入过程提供了实用的理论数据 ,对牙齿过盈量的优化设计具有重要的指导意义。

关键词：研究石油钻头牙齿过盈配合接触问题计算机模拟有限元法牙轮