本文選題：川東北地區(qū)　切入點(diǎn)：長(zhǎng)興組　出處：《成都理工大學(xué)》2015年碩士論文

【摘要】：針對(duì)四川盆地上二疊統(tǒng)長(zhǎng)興組生物礁儲(chǔ)層前人進(jìn)行了大量的綜合研究,并在沉積相、巖相古地理特征、儲(chǔ)層特征、成藏條件等方面取得了重大的研究進(jìn)展。但是對(duì)四川盆地北部地區(qū)上二疊統(tǒng)長(zhǎng)興組的臺(tái)緣生物礁儲(chǔ)層進(jìn)行微相精細(xì)刻畫(huà)相對(duì)較少且缺乏系統(tǒng)性。本文以現(xiàn)代巖石學(xué)、沉積學(xué)、層序地層學(xué)和儲(chǔ)層地質(zhì)學(xué)等理論為指導(dǎo),以川東北長(zhǎng)興組臺(tái)緣生物礁為研究對(duì)象,通過(guò)對(duì)不同野外露頭剖面及長(zhǎng)興組發(fā)育的臺(tái)地邊緣生物礁精細(xì)分析,解釋不同生物礁發(fā)育特征,建立不同地區(qū)生物礁發(fā)育模式。通過(guò)對(duì)野外剖面生物礁的GR實(shí)測(cè),結(jié)合鉆井GR曲線,對(duì)不同地區(qū)和微相生物礁的測(cè)井響應(yīng)特征進(jìn)行了研究,并分析了測(cè)井響應(yīng)的差異性,建立了生物礁不同微相儲(chǔ)層的識(shí)別模式。對(duì)長(zhǎng)興組臺(tái)緣、臺(tái)內(nèi)礁不同微相孔隙類(lèi)型、物性特征等進(jìn)行了精細(xì)分析,深入研究了開(kāi)江—梁平海槽兩側(cè)生物礁、生物礁不同微相儲(chǔ)集空間、物性參數(shù)的差異,分析了生物礁儲(chǔ)層發(fā)育的主要控制因素,進(jìn)而分析了生物礁不同微相儲(chǔ)層發(fā)育演化特征。論文取得了如下主要成果和認(rèn)識(shí):(1)通過(guò)海槽兩側(cè)臺(tái)緣生物礁沉積微相分析,認(rèn)為海槽東側(cè)多期次生物礁更發(fā)育,礁體規(guī)模較為均一,連片性更好,且普遍向海槽進(jìn)積發(fā)育,白云巖化強(qiáng)烈。海槽西側(cè)發(fā)育大規(guī)模的單個(gè)礁體,但總體分布不均,生物礁以加積為主。(2)海槽兩側(cè)生物礁儲(chǔ)層的差異性,主要表現(xiàn)為:儲(chǔ)集巖石類(lèi)型的差異、儲(chǔ)集空間的差異、儲(chǔ)層物性的差異、儲(chǔ)層的測(cè)井響應(yīng)特征的差異。差異性分析表明,海槽西側(cè)的元壩和龍崗地區(qū),礁坪物性最優(yōu),礁核次之,礁基相對(duì)較差,并且各微相孔滲具有較好相關(guān)性。海槽東側(cè)則以礁前和礁坪物性較好,礁核、礁基次之。不同地區(qū)生物礁儲(chǔ)層特征表現(xiàn)為海槽東側(cè)各微相物性總體優(yōu)于海槽西側(cè)的元壩和龍崗地區(qū)。(3)開(kāi)江—梁平海槽兩側(cè)生物礁儲(chǔ)層發(fā)育的主控因素主要表現(xiàn)為:沉積相是臺(tái)緣生物礁儲(chǔ)層形成的物質(zhì)基礎(chǔ),成巖作用決定了儲(chǔ)層發(fā)育演化的質(zhì)量,構(gòu)造破裂作用對(duì)儲(chǔ)層具有建設(shè)性和破壞型雙重影響。其中,對(duì)生物礁儲(chǔ)層物性影響最大的是白云石化作用和溶蝕作用。(4)白云石化作用對(duì)長(zhǎng)興組碳酸鹽巖儲(chǔ)層的改造作用明顯,白云巖巖石結(jié)晶程度高,具中粗晶結(jié)構(gòu),生物骨架孔、溶孔及晶間孔豐富,具有理想的儲(chǔ)集條件。溶蝕作用可以改變儲(chǔ)層的孔隙類(lèi)型和孔隙結(jié)構(gòu),增加儲(chǔ)層的孔隙度。(5)海槽不同臺(tái)緣帶云化程度存在明顯差異,表現(xiàn)為:海槽西側(cè)礁坪云化程度相對(duì)較強(qiáng),巖石類(lèi)型可見(jiàn)顆�；�?guī)r、具殘余結(jié)構(gòu)云巖和晶粒云巖;礁核云化程度較淺,巖石類(lèi)型以灰?guī)r為主;礁基巖性以泥晶生屑灰?guī)r為主,粒間主要為泥晶填隙。海槽東側(cè)礁坪晶粒白云巖多見(jiàn),礁核以礁云巖為主,礁基云化程度相對(duì)較弱,主要為灰質(zhì)云巖和云質(zhì)生屑灰?guī)r,泥晶填隙為主。
[Abstract]:A large number of comprehensive studies have been carried out on the reef reservoirs of the Changxing formation of the Upper Permian in Sichuan Basin, and great progress has been made in sedimentary facies, lithofacies and paleogeography, reservoir characteristics and reservoir forming conditions.However, the microfacies fine characterization of the upper Permian Changxing formation in the northern part of Sichuan basin is relatively few and lack of systematicness.Guided by the theories of modern petrology, sedimentology, sequence stratigraphy and reservoir geology, this paper studies the reef in the platform margin of Changxing formation in northeastern Sichuan.Based on the detailed analysis of the reef on the terrace edge of different outcrop profiles and Changxing formation, the developmental characteristics of different reefs were explained and the development models of reefs in different areas were established.The logging response characteristics of bioreefs in different areas and microfacies were studied by measuring gr of field profile and combining with drilling gr curves, and the difference of log response was analyzed.The identification pattern of different microfacies reservoirs in reef was established.Based on the detailed analysis of the pore types and physical properties of different microfacies in the platform margin and reef of Changxing formation, the differences between the two sides of the reef, the different microfacies storage space and the physical parameters of the reef are studied in depth.The main controlling factors of reef reservoir development are analyzed, and the development and evolution characteristics of different microfacies reservoirs are analyzed.By analyzing the sedimentary microfacies of the reef on the two sides of the trough, it is concluded that the multi-stage reef in the eastern side of the trough is more developed, the scale of the reef is more uniform, the continuity is better, and the reef is generally developed to the trough.Dolomitization is intense.On the west side of the trough, a large scale single reef is developed, but the overall distribution is uneven. The difference of the reef reservoirs on both sides of the trough is mainly composed of accretion and accumulation. The difference of reservoir rock type and reservoir space is the main manifestation of the difference of reservoir rock type and reservoir space.The difference of reservoir physical property and logging response of reservoir.The difference analysis shows that in Yuanba and Longgang areas in the west side of the trough, the physical properties of reef flat are the best, the reef core is the second, the reef base is relatively poor, and the microfacies porosity and permeability have good correlation.In the east side of the trough, the physical properties of the front reef and reef flat are better, the reef core and reef base are the second.The main factors controlling the development of reef reservoirs on both sides of Kaijiang-Liangping trough are as follows: sedimentary facies.It is the material foundation of the formation of the reef reservoir in the margin of the Taiwan platform.Diagenesis determines the quality of reservoir development and evolution, and structural rupture has both constructive and destructive effects on reservoir.Among them, dolomitization and dissolution have the greatest influence on the physical properties of the reef reservoir. The dolomitization has obvious effect on the transformation of carbonate reservoir of Changxing formation. The dolomite has a high degree of crystallization, medium coarse crystal structure and biological skeleton pore.The solution pore and intergranular pore are abundant and have ideal reservoir conditions.Dissolution can change the pore type and pore structure of the reservoir and increase the porosity of the reservoir. (5) there are obvious differences in the clouding degree of different platform margin zones in the trough, which shows that the degree of cloud formation in the reef flat is relatively strong in the west side of the trough.The rock types can be seen as granular limestone with residual structure dolomite and grain dolomite; the reef core is relatively shallow and the rock type is dominated by limestone; the reef bedrock is dominated by argillaceous clastic limestone with intergranular intergranular filling.In the eastern side of the trough, the grain dolomite is more common, the reef core is dominated by reef dolomite, and the reef base is relatively weak, mainly composed of gray dolomite and dolomite, and mudstone filling.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13

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本文編號(hào)：1695917