【摘要】：準噶爾盆地是一個經(jīng)歷多次構(gòu)造運動的疊合盆地,其復雜的動力學環(huán)境決定了準噶爾盆地具有特殊的構(gòu)造背景,成藏控制因素和成藏機理。準噶爾盆地目前油氣資源發(fā)現(xiàn)率:石油為30%,天然氣為8%;探明率:石油為20.74%,天然氣為3.5%。由以上數(shù)據(jù)可知整個盆地的石油和天然氣的開發(fā)處于較低水準,充分表明準噶爾盆地還具有很大的勘探前景。經(jīng)過全盆地第三次資源評價,該盆地油氣資源增加的層系主要以二疊系為主,其次是侏羅系,遞減的是三疊系。另外,吉木薩爾凹陷作為準噶爾盆地東部一個產(chǎn)油區(qū)塊,因其多期構(gòu)造運動形成的西斷東超的箕狀凹陷,具備形成油氣藏的一切地質(zhì)要素(烴源巖、儲集層、蓋層、上覆巖層)和作用(圈閉的形成、油氣的生成、運移、聚集),使得吉木薩爾凹陷二疊系的勘探受到更多的青睞。本論文主要取得以下五點成果:(1)以地震反射結(jié)構(gòu)特征、界面不整合接觸關(guān)系、巖心和巖屑錄井、測井曲線的形態(tài)和突變變化特征作為劃分依據(jù),將梧桐溝組重新劃分為梧桐溝組一段和梧桐溝組二段,并在此基礎(chǔ)上首次將全區(qū)梧桐溝組一段自上至下劃分為五個砂層組:P3wt11、P3wt12、P3wt13、P3wt14、P3wt15。(2)前人對研究區(qū)發(fā)育的沉積相類型一直存在爭議,針對爭議,本論文以扇三角洲與辮狀河三角洲的理論概念為依據(jù),以三角洲識別特征:沉積環(huán)境及其水動力特征、沉積結(jié)構(gòu)、沉積構(gòu)造、地震反射特征、砂體形態(tài)5個單因素作為論據(jù),充分論證研究區(qū)廣泛發(fā)育辮狀河三角洲。(3)通過對研究區(qū)構(gòu)造特征、流體輸導體系和動力學環(huán)境的多樣性的研究,認為研究區(qū)發(fā)育以構(gòu)造-巖性油藏為主要類型的復合油氣藏,其次為巖性油氣藏。(4)通過對研究區(qū)構(gòu)造背景、沉積體系和源儲在時空上的配置關(guān)系等的研究,總結(jié)控制梧桐溝組成藏的因素,并將吉7井區(qū)、吉19井區(qū)、吉17井區(qū)為確定為主要的油藏;吉南井區(qū),吉15井區(qū)為次要的油藏。(5)通過對梧桐溝組砂體預測和識別,確定有利區(qū)。
[Abstract]:Junggar Basin is a superimposed basin with multiple tectonic movements. Its complex dynamic environment determines that Junggar Basin has a special tectonic setting, reservoir forming controlling factors and reservoir forming mechanism. The discovery rate of oil and gas resources in Junggar basin is 30 for oil and 8 for natural gas, and 20.74 for oil and 3.5for natural gas. According to the above data, the oil and gas development of the whole basin is at a low level, which fully indicates that the Junggar basin has a great prospect of exploration. Through the third resource evaluation of the whole basin, the increase of oil and gas resources in this basin is mainly composed of Permian system, Jurassic system and Triassic system. In addition, as an oil producing block in the east of Junggar Basin, Jimusar Sag has all the geological elements (source rock, reservoir, caprock) formed by its multi-stage tectonic movement. Overlying strata) and action (trap formation, generation, migration and accumulation of oil and gas) make the Permian exploration in Jimusar sag more attractive. The main achievements of this paper are as follows: (1) based on the characteristics of seismic reflection structure, interface unconformity contact relationship, core and cuttings logging, the shape of logging curves and the characteristics of abrupt changes. The Wutonggou formation was redivided into the first section of the Wutonggou formation and the second member of the Wutunghou formation. On this basis, the first section of the Wutonggou formation in the whole area was first divided into five sand formations: 1. P3wt11P3wt12 (P3wt13) P3wt13 (P3wt14P3wt14P3wt1515). (2) the sedimentary facies types developed in the study area have been disputed for the first time. In this paper, based on the theoretical concepts of fan delta and braided river delta, the characteristics of delta identification are as follows: sedimentary environment and its hydrodynamic characteristics, sedimentary structure, seismic reflection characteristics. Five single factors of sand body morphology are used as arguments to fully demonstrate the extensive development of braided river deltas in the study area. (3) the diversity of structural characteristics, fluid transport systems and dynamic environments in the study area is studied. It is considered that the main types of composite reservoirs in the study area are tectonic-lithologic reservoirs, followed by lithologic reservoirs. (4) through the study of the structural background, the relationship between sedimentary system and source reservoir in time and space, etc. The factors controlling the reservoir composition of Wutonggou are summarized, and the main reservoir is identified as well area 7, well 19 and well 17, while the well area Ji 15 in Jinnan area is a secondary reservoir. (5) the favorable area is determined by prediction and identification of sand bodies in Wutonggou formation.
【學位授予單位】：新疆大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

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相關(guān)期刊論文 前1條

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本文編號：2158891