本文關(guān)鍵詞： 高石梯-磨溪地區(qū) 燈四段 儲(chǔ)層特征 巖溶作用 儲(chǔ)層發(fā)育規(guī)律 地質(zhì)-地球物理綜合預(yù)測(cè)　出處：《西南石油大學(xué)》2017年博士論文　論文類(lèi)型：學(xué)位論文

【摘要】：四川盆地震旦系燈影組燈四段近年來(lái)取得了巨大的勘探突破,成為了當(dāng)前天然氣勘探的熱點(diǎn)。當(dāng)前的研究雖已認(rèn)識(shí)到該套儲(chǔ)層的成因?yàn)榍馂┫喟自茙r疊合巖溶改造作用而成,但由于研究時(shí)間較短,對(duì)于該套儲(chǔ)層的發(fā)育展布規(guī)律仍認(rèn)識(shí)不清,進(jìn)而限制了燈四段更進(jìn)一步的高效開(kāi)發(fā)。鑒于此,本文以現(xiàn)代沉積學(xué)、碳酸鹽巖成巖作用、儲(chǔ)層地質(zhì)學(xué)、地球物理學(xué)等學(xué)科的理論和方法為指導(dǎo),在掌握和消化已有的研究成果的基礎(chǔ)上,綜合利用地質(zhì)、測(cè)井、地震等多種資料,系統(tǒng)研究高石梯-磨溪地區(qū)震旦系燈四段巖溶型儲(chǔ)層地質(zhì)特征,并通過(guò)對(duì)燈四段巖溶作用機(jī)理和控制因素的探討,最終明確燈四段有利巖溶型儲(chǔ)層的發(fā)育展布規(guī)律。在此基礎(chǔ)上,以地質(zhì)-地球物理資料齊全的高石3井-高石7井區(qū)為重點(diǎn)解剖對(duì)象,進(jìn)一步探索燈四段薄儲(chǔ)層的地質(zhì)-地球物理綜合預(yù)測(cè)方法。取得成果如下(1)儲(chǔ)層特征研究表明,燈四段儲(chǔ)層主要發(fā)育于藻凝塊云巖、格架云巖、藻疊層云巖和顆粒云巖中,其儲(chǔ)集空間類(lèi)型主要為(溶擴(kuò))殘余粒間孔、格架間(溶)孔以及小尺度的溶洞系統(tǒng)。儲(chǔ)層物性研究表明,燈四段儲(chǔ)集體具有較強(qiáng)的非均質(zhì)性,總體以低孔低滲的特征。基于不同的儲(chǔ)集相類(lèi)型,最終將高磨地區(qū)燈四段儲(chǔ)層分為針孔型、針孔-較小的溶蝕孔洞型、蜂窩狀溶蝕孔洞型、裂縫-孔洞型四類(lèi),為后文巖溶作用和儲(chǔ)層展布規(guī)律研究奠定了基礎(chǔ)。(2)基于高石梯-磨溪地區(qū)豐富的三維地震和鉆孔資料,論證并選擇龍王廟頂-寒武系底的印模地震厚度變化趨勢(shì)來(lái)表征燈四段巖溶古地貌,并進(jìn)一步劃分為巖溶臺(tái)面、斜坡、主溝谷和疊合斜坡四個(gè)地貌單元。通過(guò)對(duì)不同地貌單元巖溶作用強(qiáng)度和儲(chǔ)層發(fā)育情況的探討,指出疊合斜坡和主溝谷區(qū)域是最有利的巖溶型儲(chǔ)層發(fā)育區(qū)帶。(3)在古地貌恢復(fù)的基礎(chǔ)上,完成了燈四段巖溶作用的精細(xì)研究,指出表生期溶蝕作用是研究區(qū)儲(chǔ)層發(fā)育的最關(guān)鍵因素。并結(jié)合不同的識(shí)別特征,將表生期溶蝕作用進(jìn)一步細(xì)分為大陸型早成巖期溶蝕作用和海岸帶溶蝕作用,指出大陸型早成巖期溶蝕作用整體決定了燈四段巖溶型儲(chǔ)層的基本特征和時(shí)空分布,而海岸帶溶蝕作用則起到調(diào)整和改善儲(chǔ)層橫向分布的重要作用。(4)結(jié)合儲(chǔ)層分布特征研究,完成了燈四段有利巖溶型儲(chǔ)層發(fā)育規(guī)律研究,并結(jié)合儲(chǔ)能系數(shù)和有利巖溶型儲(chǔ)層發(fā)育區(qū)帶優(yōu)選結(jié)果,總結(jié)了高磨地區(qū)燈四段有利儲(chǔ)集區(qū)帶判別依據(jù),指出儲(chǔ)能系數(shù)值≥3.0,且位于有利巖溶型儲(chǔ)層發(fā)育區(qū)帶I 1區(qū)為最有利儲(chǔ)集區(qū)帶,而當(dāng)3.0儲(chǔ)能系數(shù)≥2.0,且位于有利巖溶型儲(chǔ)層發(fā)育區(qū)帶的I2區(qū)則為次有利儲(chǔ)集區(qū)帶。(5)通過(guò)對(duì)高石3-高石7井及其鄰近井區(qū)的精細(xì)解剖,最終形成了高磨地區(qū)燈四段薄儲(chǔ)層地質(zhì)-地球物理綜合預(yù)測(cè)方法:首先從巖溶古地貌出發(fā),初步篩選有利區(qū)帶;隨后結(jié)合30HZ低頻強(qiáng)振幅優(yōu)勢(shì)分布區(qū)明確目標(biāo)范圍,最終通過(guò)頻率衰減特征和薄儲(chǔ)層反演技術(shù)來(lái)確定目標(biāo)靶位。通過(guò)與后期新完鉆井進(jìn)行成果對(duì)比,認(rèn)為該方法具有良好的適用性。
[Abstract]:Sinian Dengying Formation in Sichuan basin four lamp in recent years has made great exploration breakthrough, became the hotspot of natural gas exploration. The current study is to recognize the causes of reservoirs were Hill beach facies dolomite karst superimposed transformation role, but because of the short time for development the distribution of the reservoir is still unclear, thus limiting the lamp four further efficient development. In view of this, based on the modern sedimentology, diagenesis, reservoir geology, geophysics theory and method as the guide, based on research results of master and digest the existing comprehensive utilization, geology, logging, seismic and other data, the system of Gaoshiti Moxi area lights four Sinian karst reservoir geological characteristics, and through the discussion of the four light karst mechanism and control factors, finally clear light four Distribution favorable karst reservoirs. Based on this, with a high stone geological geophysical data complete 3 well - high stone 7 well area as the key anatomical objects, to further explore the comprehensive geophysical prediction of geological section lamp four thin layer method. The following results (1) study on the characteristics of reservoir light layer show that four reservoir mainly developed in the framework of algae clot dolomite, dolomite, algal laminated dolomite and particle dolomite, the storage space types (mainly solution expansion) residual intergranular pore, inter frame (karst) cave system as well as small scale reservoir on the table. Ming, light four reservoir with strong heterogeneity, characterized with low porosity and low permeability. In different types of reservoir based on the grinding area lights four reservoir is divided into needle hole, pores type pinhole smaller pores, honeycomb type, fracture pore type four and for the karstification and Laid the foundation for the study of distribution of the reservoir layer. (2) Gaoshiti Moxi Area 3D seismic and borehole data based on the rich, and it is the impression change trend of seismic thickness Longwangmiao top Cambrian bottom to characterize the lamp four section karst palaeogeomorphology, and further divided into karst Taiwan, the main gully slope and laminated slope four geomorphic units. Based on the study of the development strength of reservoir and different geomorphic units of karst, pointed out that the composite slope and gully area is the most favorable karst reservoir development zone. In (3) on the basis of palaeogeomorphology, fine study completed four karst lamp the pointed out that supergene dissolution is the key factor of reservoir in the study area. Combined with the recognition of different features, the supergene dissolution is further subdivided into dissolution and dissolution of coastal continental type early diagenetic stage, pointed out that the mainland Type the overall dissolution of early diagenetic stage determines the basic characteristics and spatial distribution of light four segment of the karst reservoir, and coastal dissolution plays an important role in adjusting and improving reservoir distribution. (4) combined with the reservoir distribution research, completed the lamp four favorable karst reservoir development law the research, combined with the storage coefficient and favorable karst reservoir development zone selection results, summed up the high grinding lamp in four sections of the favorable reservoir zone criterion, pointed out that the energy storage coefficient is less than 3, and is located in the favorable karst reservoir development zone I 1 area is the most favorable reservoir zone. When the 3 storage coefficient is less than 2, and is located in the favorable karst reservoir development zone I2 zone is the favorable reservoir zone. (5) through the fine dissection of the high stone 3- high stone 7 well and adjacent wells, eventually forming a high grinding area four light thin Reservoir Geology Geophysical prediction Methods: first, from the ancient karst landform of the preliminary selection of favorable zone; then combined with the advantages of 30HZ low frequency and high amplitude distribution area clear target range, through the frequency attenuation characteristics and thin reservoir inversion technique to determine the target position. The results of the new drilling and later than that, this method has good applicability.

【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P618.13

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