【摘要】：論文以塔里木盆地塔中中古5-7井區(qū)中下奧陶統(tǒng)鷹山組海相碳酸鹽巖層系為研究對(duì)象,以碳酸鹽沉積學(xué)以及儲(chǔ)層地質(zhì)學(xué)理論為指導(dǎo),同時(shí)采用多學(xué)科、多手段綜合分析方法,通過(guò)巖心觀(guān)察、鑄體薄片、成像測(cè)井、掃描電鏡等結(jié)合測(cè)試和地震資料成果,圍繞碳酸鹽巖儲(chǔ)層沉積特征、儲(chǔ)層物性特征、展布規(guī)律及控制因素等進(jìn)行了系統(tǒng)研究。 中古5-7井區(qū)中下奧陶統(tǒng)鷹山組自上而下分為鷹一段、鷹二段、鷹三段和鷹四段,鷹一段地層整體上遭受不同程度剝蝕。由北向南,鷹山組地層剝蝕程度逐漸加大、地層厚度逐漸減小,在塔中1號(hào)坡折帶附近地層殘余厚度最大；在平行塔中1號(hào)坡折帶方向,鷹山組地層西薄東厚。鷹山組不同層段地層總體沿平行塔中號(hào)坡折帶方向呈帶狀展布,地層橫向上厚度差異較小,分布較穩(wěn)定,鷹山組儲(chǔ)層發(fā)育與小層分布具有較好的相關(guān)性。區(qū)內(nèi)鷹山組主要發(fā)育開(kāi)闊臺(tái)地相沉積,可進(jìn)一步劃分出高能砂屑灘、灘間海、低能砂屑灘等亞相環(huán)境,縱向上表現(xiàn)為臺(tái)內(nèi)灘與灘間海的多旋回組合。在靠近號(hào)帶的鷹一段高能砂屑灘主要分布在中古5井-中古1井以東地區(qū),中低能砂屑灘呈斑狀、線(xiàn)狀平行號(hào)帶分布于中古5-1井-中古4井-中古7井一帶。鷹二段高能砂屑灘呈北西-南東向大面積成片分布,中低能砂屑灘和灘間海呈斑狀沿平行號(hào)帶方向分布。 鷹山組儲(chǔ)集巖巖石類(lèi)型復(fù)雜,孔隙度由白云巖過(guò)渡至灰?guī)r具逐漸變小趨勢(shì)。宏觀(guān)儲(chǔ)集空間類(lèi)型以溶蝕孔洞為主,局部發(fā)育洞穴及裂縫；微觀(guān)儲(chǔ)集空間類(lèi)型以粒間溶孔、粒內(nèi)溶孔、晶間孔、微裂縫及溶蝕縫為主。儲(chǔ)層整體上縱向疊置、橫向成層、平面上大面積分布,局部具有較強(qiáng)的非均質(zhì)性和穿層性。區(qū)內(nèi)鷹一段第3、5層亮晶砂屑灰?guī)r發(fā)育段儲(chǔ)層較為有利,儲(chǔ)層主要為特低孔低滲儲(chǔ)層,總體屬Ⅱ-Ⅲ類(lèi)儲(chǔ)層。以孔洞型和裂縫-孔洞型儲(chǔ)層類(lèi)型為主。中古5-7井區(qū)中下奧陶統(tǒng)鷹山組碳酸鹽巖儲(chǔ)層主要控制因素為沉積相帶、成巖作用和構(gòu)造作用。其中位于有利沉積相帶的高能砂屑灘為儲(chǔ)層發(fā)育的基礎(chǔ),層間巖溶和埋藏巖溶作用為控制鷹山組儲(chǔ)層發(fā)育及展布的關(guān)鍵,構(gòu)造作用產(chǎn)生的裂縫及斷裂改善儲(chǔ)層滲濾性能。有利儲(chǔ)層的分布受臺(tái)內(nèi)灘相帶和巖溶發(fā)育有利帶及斷裂活動(dòng)等綜合控制,總體沿?cái)嗔�、巖溶發(fā)育區(qū)分布。較好儲(chǔ)層發(fā)育帶位于工區(qū)東南部ZG7井-ZG7-H1井-ZG702井-ZG7-2井一帶、ZG6井-ZG6-2井一帶及工區(qū)南部ZG518-ZG434井一帶。
[Abstract]:The paper takes the marine carbonate series of Yingshan formation of middle and lower Ordovician in Tarim Basin as the research object, and takes carbonate sedimentology and reservoir geology theory as the guidance, at the same time, adopts multi-disciplinary and multi-means comprehensive analysis method. By means of core observation, casting thin slice, imaging logging, scanning electron microscope and so on, the sedimentary characteristics, physical properties, distribution and controlling factors of carbonate reservoir are systematically studied. The Yingshan formation of the middle and lower Ordovician in the middle and lower Ordovician well area is divided from top to bottom into Ying1 member, Ying2 member, Ying3 formation and Ying4 formation, and the formation of the first member of Yingyi formation has been denudated to varying degrees as a whole. From north to south, the erosion degree of Yingshan formation gradually increases, the formation thickness decreases gradually, and the residual thickness is the largest near slope 1 break zone in Tazhong, and in parallel with the direction of slope 1 break zone in Tazhong formation, the formation of Yingshan formation is thick in the west and east. The strata of different strata of Yingshan formation are distributed along the direction of parallel Tazhong slope break, the thickness difference is small and the distribution is stable. The reservoir development of Yingshan formation has a good correlation with the distribution of small layers. The Yingshan formation is mainly composed of open platform facies, which can be further divided into high energy sand and debris beach, interbeach sea and low energy sand debris beach subfacies environment. The longitudinal manifestation is the multi cycle combination of the platform beach and the inter beach sea. In the area east of Middle 5 well to Middle ancient 1 well, the middle and low energy sand debris beach is spotted, and the linear parallel belt is distributed in the middle ancient 5-1 well, the middle ancient 4 well and the middle ancient 7 well. The high energy sand debris beach of the second stage of Ying is distributed in a large area in the north-west to the south east direction, and the middle and low energy sand debris beach and the interbeach sea distribute in the direction of parallel number zone. The reservoir rock types of Yingshan formation are complex and the porosity transition from dolomite to limestone tends to decrease gradually. The main types of macroscopic reservoir space are dissolution holes, while the microcosmic reservoir spaces are mainly composed of intergranular dissolved pores, intragranular dissolved pores, intergranular pores, microcracks and dissolution joints. As a whole, the reservoir is vertically overlaid, stratified laterally, distributed in a large area on the plane, and has strong heterogeneity and stratification. The reservoir developed in the third and fifth formation of Ying-1 formation is favorable, and the reservoir is mainly low porosity and low permeability reservoir, which belongs to type 鈪，

本文編號(hào)：2189047