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Analysis on forming conditions of deep marine reservoirs and their concentration belts in superimposed basins in china

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Science Bulletin 2007年第S1期 12-27页

作者： ZHAO WenZhi, WANG ZeCheng, ZHANG ShuiChang & WANG HongJun research institute of petroleum {3. and Development, petrochina, Beijing 100083. china

By taking the Tarim Basin, Sichuan Basin and Ordos Basin as examples, the conditions for deep marine reservoir formation were illustrated in three aspects listed below: late-stage superimposition style, burial history and structural deformation of the marine stratigraphic system. The burial history of marine source rocks can be divided into three types, i.e., type I, type II and type III, which are obviously different from the case with present hydrocarbon phases in terms of hydrocarbon generation and petroleum-reservoir formation. Based on evolution history, the structural belts in the marine stratigraphic sequence can also be divided into four types, i.e. earlier normal fault-later fault-fold type, earlier uplift-later fault-fold type, earlier uplift-later flattened slope type, and earlier depression-later thrust type. In this paper, a successive gas generation model was proposed, and it was particularly pointed out that coupling of geothermal field annealing evolution and tectonic subsidence and late gas generation from dispersed liquid hydrocarbon in highly matured to over-matured source rocks are key factors for formation of marine petroleum reservoirs. The geological conditions for formation of high-grade reservoirs in deep marine system, covering early hydrocarbon injection, deep denudation and buried dolomitization, were summarized. It was finally concluded that three major structural belts, i.e. paleo-uplift belt characterized by composite hydrocarbon accumulation, paleo-fault belt and high-energy sedimentary facies belt, were involved in marine hydrocarbon accumulation.

关键词： superposition basin marine formation deep zone dispersed liquid hydrocarbon geothermal field structural deformation

Discussion on marine source rocks thermal evolvement patterns in the Tarim Basin and Sichuan Basin,west china

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Science Bulletin 2007年第S1期 141-149页

作者： ZHANG Bin, ZHAO Zhe, ZHANG ShuiChang & CHEN JianPing Central Laboratory of petroleum Geology research, research {3. of petroleum exploration and Development, petrochina, Beijing 100083. china

Taking marine source rocks of lower Paleozoic in the Tarim Basin and Paleozoic ones in the Sichuan Basin as examples, their sedimentation process could be classified into four styles: continuous subsidence with deep sedimentation in early stage, continuous subsidence with deep sedimentation in later stage, that deeply buried-uplift-shallowly buried, and that shallowly buried-uplift-deeply buried. Unlike that in East china, the marine source rocks evolvement patterns did not accord with sedimentation styles one by one in superimposed basins in west china. Taking local geothermal field into account, four types of source rock evolvement patterns were built: that evolved fast in early stage, evolved fast in middle stage, evolved continuously and evolved in multistage. Among them, the 1st pattern contributed little to the present industrial oil pools directly, but paleo-oil reservoirs and gases cracked from crude oils were main exploration targets. Although some gases were found in the 2nd pattern, the scale was not big enough. For the 3.d and 4th patterns, the hydrocarbon potential depended on organic matters maturity in early stage. For relatively low mature rocks, it was possible to generate some oils in later stage; otherwise the main products were gases. Paleo-oil reservoirs remained fairly well in the Sichuan Basin, and most source rocks underwent kerogen-oil-gas processes, which was useful reference to gas exploration in the Tarim Basin.

关键词： thermal evolvement patterns marine source rocks hydrocarbon potential sedimentary style superimposed basins

Poly-phase salt tectonics and hydrocarbon accumulation in Tarim superimposed basin,northwest china

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Science china Earth Sciences 2004年第Z2期47卷 104-113页

作者： TANG Liangjie1,2, JIN Zhijun1’3. JIAChengzao1’4, Pl Xuejun5 & CHEN Suping1,2 1. Key Laboratory for Hydrocarbon Accumulation of Education Ministry, Beijing 102249, china 2. Basin & Reservoir research Center, University of petroleum, Beijing 102249, china 3. institute of petroleum exploration and Development, SINOPEC, Beijing 100083. china 4. petrochina Company Limited, Beijing 100011, china 5. Tarim Oilfield Company, petrochina Company Ltd., Korla 841000, china Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China Basin & Reservoir research Center University of Petroleum Beijing 102249 China Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China institute of petroleum exploration and Development SINOPEC Beijing 100083 China Key Laboratory for Hydrocarbon Accumulation of Education Ministry Beijing 102249 China petrochina Company Limited Beijing 100011 China Tarim Oilfield Company PetroChina Company Ltd. Korla 841000 China

The purpose of this paper is to discuss the poly-phase salt tectonics and its relation to the hydrocarbon accumulation of the Tarim superimposed basin. Several salt sequences are developed in the Tarim basin, they are: (1) the Mid-Early Cambrian salt sequence, mainly distributed in the west part of the north Tarim uplift and Keping uplift; (2) the Early Carboniferous salt sequence, mainly distributed in the south slope of the north Tarim uplift; (3. the Paleogene salt sequence, mainly distributed in the mid-west part of the Kuqa foreland fold belt and north Tarim uplift; and (4) the Miocene salt sequence, mainly distributed in the east part of the Kuqa foreland fold belt. The salt sequences deposited in the tectonically calm scenario, while the salt layers deformed during the period of intense tectonism. Although the salt sequences are characteristic of plastic flow, the differences of salt deformation styles exist in the different salt sequences be-cause of the different deformation mechanism. It is attractive that the distribution of the large oil-gas fields or pools has a bearing upon the salt sequences and salt structures, such as the Tahe oilfield related to the Lower Carboniferous salt sequence and laterally facies changed mudstone, the Kela No.2 gas field to the Paleogene salt structures, and the Dina gas field to the Miocene salt structures. It is indicated that the large-scale hydrocarbon accumulation is con-trolled by the poly-phase salt sequences and structures. The deep analysis of the poly-phase salt tectonics is helpful to understanding the characteristics of the structural deformation and oil-gas accumulation of the Tarim basin.

关键词： superimposed basin, salt tectonics, hydrocarbon accumulation, Tarim basin.

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冀中坳陷杨村斜坡结构成因及油气成藏模式

石油学报 2004年第4期25卷 19-22页

作者：袁选俊靳久强孟庆仁王少春卢学军中国石油勘探开发研究院北京100083 中国科学院地质与地球物理所北京100029 华北油田分公司勘探开发研究院河北任丘062552

渤海湾盆地断陷湖盆的斜坡带是油气聚集的重要场所。通过对廊固武清凹陷构造演化历程分析 ,确定了杨村斜坡的形成演化过程。杨村斜坡不具有相邻文安斜坡“深沟高垒”式的垒嵌结构 ,而是一个相对简单的单斜。从斜坡成因机制上解析了垒... 详细信息

渤海湾盆地断陷湖盆的斜坡带是油气聚集的重要场所。通过对廊固武清凹陷构造演化历程分析 ,确定了杨村斜坡的形成演化过程。杨村斜坡不具有相邻文安斜坡“深沟高垒”式的垒嵌结构 ,而是一个相对简单的单斜。从斜坡成因机制上解析了垒嵌结构与单斜地质结构差异的形成原因。根据杨村斜坡的单斜地质结构特征 ,其成藏模式应以地层

关键词：渤海湾盆地斜坡带构造演化成因机制成藏模式

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塔中地区泥盆系东河砂岩石油运聚方向研究

天然气地球科学 2011年第6期22卷 996-1000页

作者：张琴唐玄杨镱婷葛明娜中国石油勘探开发研究院廊坊分院河北廊坊065007 中国地质大学(北京) 北京100083

筛选有机地球化学参数中不受或者很少受其他地质因素干扰的地球化学指标作为油气示踪的有效参数,探讨塔中地区泥盆系东河砂岩中油气充注方向。泥盆系东河砂岩中地球化学指标(1,3.6-)/(1,3.6-+1,2,5-)三甲基萘(TMNr)、4-甲基二苯并噻吩/1... 详细信息

筛选有机地球化学参数中不受或者很少受其他地质因素干扰的地球化学指标作为油气示踪的有效参数,探讨塔中地区泥盆系东河砂岩中油气充注方向。泥盆系东河砂岩中地球化学指标(1,3.6-)/(1,3.6-+1,2,5-)三甲基萘(TMNr)、4-甲基二苯并噻吩/1-甲基二苯并噻吩(4-/1-MDBT)、咔唑类化合物含量(W)、C2烷基咔唑的结构类型(G1、G2、G3.存在一定的运移分馏作用。表现为随着油气运移距离的增长,TMNr值、4-/1-MDBT值、W值和G3.呈现出有序的降低;而C2烷基咔唑的结构类型G1值、G2值和C3.咔唑/C2-咔唑值则随着石油运移距离的延伸而逐渐增大。根据对上述地球化学指标的综合分析,塔中东部泥盆系东河砂岩的油气充注表现为自NW向SE方向和自SE向NW方向往构造高部位充注,塔中西段则表现为自NW向SE方向和自NE向SW方向充注。同时研究结果也表明该区的油气可能经历了相当长距离的运移。

关键词：地球化学指标石油运移东河砂岩塔中地区

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气井压后稳态产能公式和压裂数值模拟研究

天然气工业 2003年第4期23卷 74-76页

作者：杨正明张松张训华黄延章石油勘探开发研究院廊坊分院渗流流体力学研究所

低渗气藏在已探明的天然气地质储量中占有相当大的比重。但低渗气藏的低产特征 ,使得这类气藏往往难以直接获得商业性开发利用 ,只有通过储层压裂改造才能达到经济开发要求。文章根据气井压后流体渗流流动规律的变化 ,利用气藏的渗流理... 详细信息

低渗气藏在已探明的天然气地质储量中占有相当大的比重。但低渗气藏的低产特征 ,使得这类气藏往往难以直接获得商业性开发利用 ,只有通过储层压裂改造才能达到经济开发要求。文章根据气井压后流体渗流流动规律的变化 ,利用气藏的渗流理论 ,推导出气井压后稳态产能公式 ;并利用油藏数值模拟的方法 ,系统地分析了压裂缝长、导流能力、有效渗透率、有效厚度等对塔巴庙区块压裂初期产量大小和压后产量变化的影响 ,得到塔巴庙区块低渗气藏压裂井筛选原则和压裂设计参数。在做压裂选井时 ,应选择有效渗透率和有效厚度都较大的井进行压裂 ;在压裂设计时 ,应优选出合理的裂缝导流能力和裂缝缝长 ,从而为低渗气藏的高效开发提供科学决策。

关键词：气井压后稳态产能公式压裂缝数值模拟低渗透油气藏水力压裂产气量

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中国天然气资源潜力及供需趋势

天然气工业 2004年第3期24卷 1-4页

作者：赵贤正李景明李东旭马硕鹏张福东北京石油大学中国石油勘探开发研究院廊坊分院

中国天然气资源丰富 ,但分布不均衡 ;勘探开发程度低 ,发展潜力大 ;目前 ,天然气处于快速发展阶段。天然气勘探目标明确 ,今后一段时间储量和产量将保持高速增长。煤层气是重要的非常规天然气 ,发展潜力大。天然气消费将不断增长 ,供需... 详细信息

中国天然气资源丰富 ,但分布不均衡 ;勘探开发程度低 ,发展潜力大 ;目前 ,天然气处于快速发展阶段。天然气勘探目标明确 ,今后一段时间储量和产量将保持高速增长。煤层气是重要的非常规天然气 ,发展潜力大。天然气消费将不断增长 ,供需关系日趋紧张 ,预计在 2 0 0 5年以前供需基本平衡 ,2 0 10年以后国内生产的天然气已不能满足需求 ,2 0 2 0年国内供给缺口将达到 ( 5 0 0～ 80 0 )× 10 8m3.

关键词：中国天然气资源供需趋势储量产量

Tectonic types and evolution of Ordovician proto-type basins in the Tarim region

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Science Bulletin 2007年第S1期 164-177页

作者： HE DengFa1, ZHOU XinYuan2, ZHANG ChaoJun3.& YANG XiaoFa1 1 Energy Resources School, china University of Geosciences, Beijing 100083.2 petrochina Tarim Oilfield Company, Korla 841000, china 3.{3. institute of petroleum exploration and Development, petrochina, Beijing 100083. china

The Ordovician system is an important target for exploration in the Tarim Basin. Restoration of the Ordovician tectono-depositional environment is a key basis for the study of the structural development history in Tarim block and the prediction of the favorable Ordovician reservoir belts (zones). Based on the surrounding tectonic settings, the litho-facies and sedimentary fill, the palaeo-geography, palaeoclimate and palaeo-ecology, and the structural deformation and magmatic eruptions, in this paper we combine the sedimentary fill in the basin with the development of the surrounding orogenic belts and re-build the proto-type basins of the different Ordovician periods. During the Ordovician period, the Tarim region was characterized by the composite of the interior cratonic depression with the peripheral cratonic depression. The interior cratonic depression in the central and western parts is mainly the depositional area of the platform facies while the peripheral cratonic depression in the eastern part is mainly the zone of deepwater basin facies, with the slope acting as the transition belt between them. During the Late Ordovician period, the closure of the Northern Kunlun Ocean and destruction of the trencharc-basin system in the Altyn Tagh region put the southern part of the Tarim block under compression and uplifting and turned the central and western parts of the carbonate platform into the mixed depositional continental shelf. The eastern region of the basin had the over-compensated flysch sedimentation with huge thickness, marking the drastic turn of the basin nature. The basin tectonic framework turned to the south-north differentiation of the Silurian period from the east-west differentiation of the Ordovician period.

关键词： Ordovician period proto-type basin composite basin basin evolution Tarim block

Geochemical Characteristics and Origin of Natural Gases in the Qaidam Basin,china

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 103-115页

作者： ZHANG Xiaobao, HU Yong, DUAN Yi, MA Liyuan, MENG Zifang, HE Peng,ZHOU Shixin and PENG DehuaState Key Laboratory of Gas Geochemistry, Lanzhou institute of Geology, Chinese Academy ofSciences, Lanzhou, Gansu 73.000 research institute of {3. exploration and Development, Qinghai {3. Company,CNPC, Dunhuang, Gansu 73.200 Chinese Acad Sci Lanzhou Inst Geol State Key Lab Gas Geochem Lanzhou 730000 Gansu Peoples R China Qinghai Petr Co Res Inst Petr Explorat & Dev CNPC Dunhuang 736200 Gansu Peoples R China

Sixty-five natural gas samples were collected from 19 oil-gasfields in theQaidam basin, china. The chemical composition and carbon isotope values of the samples weremeasured, and the geochemical characteristics and origin of the natural gases were studied. Thegases can be divided into biogenic gases, sapropelic oil-type gases, mixed type oil-type gases,coal-type gases and mixed gas. The delta^(13.C_1 values of the biogenic gases are very small and theC_2^+ contents of them are very low, ranging from -68.2 per thousand to -61 .8 per thousand and0.06 percent to 0.20 percent respectively. They have heavy delta D and delta^(13.C_(CO_2), showing aCO_2 reduction pathway. They ,are distributed in the East depression region and derived from theQuaternary source rocks. The sapropelic oil-type gases have small delta^(13.C_2 values and highC_2^+ ranging from -3..6 per thousand to -28.6 per thousand and from 3..01 percent to 47.15 percentrespectively. The mixed type oil-type gases have delta^(13.C_2 values and C_2^+ contents varyingfrom -28.6 per thousand to -24.8 per thousand and from 4.81 percent to 26.06 percent *** sapropelic oil-type gases and mixed type oil-type gases are associated with oil-type oils,distributed in the West depression region and derived from the Tertiary saltwater lacustrinesapropelic source rocks and humic source rocks respectively. The delta^(13.C_2 values of thecoal-type gases are extremely high and the C_2^+ contents are very low, changing from -23.3.perthousand to -12.5 per thousand and from 0.06 percent to 18.07 percent respectively. The coal-typegases in the Nanbaxian gasfield and the Lenghu oil-gasfields in the North fault block belt arederived from the Middle Jurassic coal-measures source rocks, whereas those in the West depressionregion are derived from the Tertiary saltwater lacustrine humic source rocks. Compared with someother basins in china, the natural gases there have obviously heavier delta^(13.C due to the heavierdelta^(1

关键词： natural gas geochemical characteristics origin Qaidam basin