内蒙古石油化工
內矇古石油化工
내몽고석유화공
INNER MONGULIA PETROCHEMICAL INDUSTRY
2011年
15期
87-90
,共4页
韩天佑%田永强%李慧%李士祥
韓天祐%田永彊%李慧%李士祥
한천우%전영강%리혜%리사상
内陆湖盆%低渗透大油田%鄂尔多斯盆地%岩性油藏%富集规律%勘探技术
內陸湖盆%低滲透大油田%鄂爾多斯盆地%巖性油藏%富集規律%勘探技術
내륙호분%저삼투대유전%악이다사분지%암성유장%부집규률%감탐기술
Inland Lake Basin%Big Oilfied on Low Permeability%Ordos Basin%Lithologic Reservoir%Petroleum Occurrence%Exploration Technology
鄂尔多斯地区中生代为典型的内陆坳陷型湖盆,河流-湖泊三角洲相碎屑岩沉积发育,湖相泥岩有机质丰富、砂岩储层大面积展布、储盖组合有利,是发现大型油田的有利盆地。但是,这种低渗透岩性油藏隐蔽性强、储集物性差、非均质性强、油水关系复杂,勘探难度大。近年来,针对内陆湖盆的地质特点和低渗透岩性油藏的勘探难点,通过多学科联合攻关,快速探明了以姬塬为代表的内陆湖盆低渗透大油田,取得了一系列地质认识的创新和勘探技术的新突破：综合地质研究进一步明确了鄂尔多斯内陆坳陷湖盆烃源岩生烃能力强;多类型三角洲砂体发育,并首次构建了大型退覆式三角洲沉积模式,丰富了内陆坳陷型湖盆的沉积地质理论;率先提出了幕式排烃、多种输导体系并存是多层系复合成藏的重要条件的新认识。在勘探实践中,形成了黄土塬地表条件下岩性油藏地震勘探配套技术系列,丰富了地球物理勘探理论和技术;集成应用了高精度测井、核磁测井等先进测井技术,首次提出了低孔渗储层的双孔隙结构导电模型,提高了油层的测井识别精度;自主研发了独具特色的适应于低渗透、超低渗透油层的高效压裂增产技术。这些勘探技术的应用推动了低渗透油气藏勘探理论的发展。
鄂爾多斯地區中生代為典型的內陸坳陷型湖盆,河流-湖泊三角洲相碎屑巖沉積髮育,湖相泥巖有機質豐富、砂巖儲層大麵積展佈、儲蓋組閤有利,是髮現大型油田的有利盆地。但是,這種低滲透巖性油藏隱蔽性彊、儲集物性差、非均質性彊、油水關繫複雜,勘探難度大。近年來,針對內陸湖盆的地質特點和低滲透巖性油藏的勘探難點,通過多學科聯閤攻關,快速探明瞭以姬塬為代錶的內陸湖盆低滲透大油田,取得瞭一繫列地質認識的創新和勘探技術的新突破：綜閤地質研究進一步明確瞭鄂爾多斯內陸坳陷湖盆烴源巖生烴能力彊;多類型三角洲砂體髮育,併首次構建瞭大型退覆式三角洲沉積模式,豐富瞭內陸坳陷型湖盆的沉積地質理論;率先提齣瞭幕式排烴、多種輸導體繫併存是多層繫複閤成藏的重要條件的新認識。在勘探實踐中,形成瞭黃土塬地錶條件下巖性油藏地震勘探配套技術繫列,豐富瞭地毬物理勘探理論和技術;集成應用瞭高精度測井、覈磁測井等先進測井技術,首次提齣瞭低孔滲儲層的雙孔隙結構導電模型,提高瞭油層的測井識彆精度;自主研髮瞭獨具特色的適應于低滲透、超低滲透油層的高效壓裂增產技術。這些勘探技術的應用推動瞭低滲透油氣藏勘探理論的髮展。
악이다사지구중생대위전형적내륙요함형호분,하류-호박삼각주상쇄설암침적발육,호상니암유궤질봉부、사암저층대면적전포、저개조합유리,시발현대형유전적유리분지。단시,저충저삼투암성유장은폐성강、저집물성차、비균질성강、유수관계복잡,감탐난도대。근년래,침대내륙호분적지질특점화저삼투암성유장적감탐난점,통과다학과연합공관,쾌속탐명료이희원위대표적내륙호분저삼투대유전,취득료일계렬지질인식적창신화감탐기술적신돌파：종합지질연구진일보명학료악이다사내륙요함호분경원암생경능력강;다류형삼각주사체발육,병수차구건료대형퇴복식삼각주침적모식,봉부료내륙요함형호분적침적지질이론;솔선제출료막식배경、다충수도체계병존시다층계복합성장적중요조건적신인식。재감탐실천중,형성료황토원지표조건하암성유장지진감탐배투기술계렬,봉부료지구물리감탐이론화기술;집성응용료고정도측정、핵자측정등선진측정기술,수차제출료저공삼저층적쌍공극결구도전모형,제고료유층적측정식별정도;자주연발료독구특색적괄응우저삼투、초저삼투유층적고효압렬증산기술。저사감탐기술적응용추동료저삼투유기장감탐이론적발전。
The Mesozoic stratum of Ordos basin is the typical lake basin of inland depression.It developed a set of clastic sedimentary of river and lake delta. Organic matter of lacustrine mudstone is rich,sandstone reservoirs extensive spreading,and the combination of reservoirs and cap rocks are beneficial.It＇s the beneficial basin for discovery large oilfield.However,this low permeability lithologic reservoirs have the characteristics of strong concealment,poor reservoir physical properties,strong heterogeneity,complex of oil-water contact,great difficulte for exploration.Recently,rapid proved the low permeability big oilfield in inland lake basin such as Jiyuan oilfield,thoroughly joint efforts of multi-sciences according to the geological characteristics of inland lake basin and exploration difficulty of low permeability lithologic reservoirs.Achieved a series of innovations of geological recognitions and new breakthrough of exploration technology.Definite the source rocks have high intensity oil generation ability of inland depression lake basin in Ordos basin.Ordos Basin has the oil generation condition of formed big oilfield.It is the first time constructed the sedimentary model of large offlap type delta.Enriched the sedimentary geological theory of inland depression lake basin.Present the new recognition that episodic hydrocarbon and many passage systems are the important conditions of more stratum hydrocarbon accumulation.Formed seismic exploration matching technology of lithologic reservoirs in the loess tableland surface condition.Enriched the geophysical exploration theory and technology.Integrated application the advanced logging technology of high precision logging and nuclear magnetic logging.First proposed dual porosity structure conduction model of low permeability and low porosity reservoirs.Improved the logging recognition accuracy of oil reservoirs.Independent development efficient fracture and increase the oil productivity technology which adapt to low permeability oil reservoirs and super low permeability oil reservoirs.Extension and application of the exploration technology development the exploration theory of low permeability hydrocarbon reservoirs.
