本文選題：呵叻盆地　切入點(diǎn)：二疊系　出處：《沉積學(xué)報(bào)》2017年04期 　論文類(lèi)型：期刊論文

【摘要】：通過(guò)研究區(qū)3口鉆井巖芯、測(cè)井、錄井資料分析,結(jié)合薄片鑒定、陰極發(fā)光、X衍射、同位素及微量元素分析等分析手段,對(duì)呵叻盆地二疊系碳酸鹽巖沉積相發(fā)育特征及沉積模式進(jìn)行了系統(tǒng)分析。研究表明,呵叻盆地二疊系Pha Nok Khao組發(fā)育緩坡型無(wú)障壁碳酸鹽臺(tái)地沉積,研究區(qū)位于碳酸鹽臺(tái)地前緣斜坡部位,以海水浪基面為界,可劃分為臺(tái)地前緣淺水斜坡亞相及較深水斜坡亞相。淺水斜坡亞相指示沉積環(huán)境為位于浪基面以下或附近、水動(dòng)力弱、弱還原—弱氧化的臺(tái)地前緣斜坡環(huán)境;較深水斜坡亞相組合指示沉積環(huán)境為位于浪基面以下、水體較深、水動(dòng)力弱、弱還原—中等還原的前緣斜坡環(huán)境。整體來(lái)看,研究區(qū)二疊系碳酸鹽巖沉積時(shí)期主要為水體較深、水動(dòng)力弱、垂向上沉積環(huán)境穩(wěn)定的低能環(huán)境沉積。該沉積環(huán)境不利于形成良好的基質(zhì)孔隙條件,有利儲(chǔ)層發(fā)育主要取決于碳酸鹽巖地層后期改造程度。
[Abstract]:Through the analysis of drilling core, logging and logging data in the study area, combined with thin slice identification, cathodoluminescence X-ray diffraction, isotope and trace element analysis, etc. The sedimentary facies development characteristics and sedimentary models of Permian carbonate rocks in Kulak basin are systematically analyzed. The results show that the Pha Nok Khao formation of Permian in Kulat basin develops gentle slope type unobstructed carbonate platform deposition. The study area is located at the front slope of carbonate platform, with the sea wave base as the boundary, and can be divided into subfacies of shallow slope and subfacies of deeper slope in front of platform. The subfacies of shallow slope indicates that the sedimentary environment is below or near the surface of wave. Hydrodynamic, weak reduction-weak oxidation front slope environment; Deepwater slope subfacies assemblage indicates that the sedimentary environment is below the surface of the wave, the water body is deeper, the hydrodynamic is weak, and the weak reduction-moderate reduction is the front slope environment. The sedimentary period of Permian carbonate rocks in the study area is mainly composed of low energy deposits with deep water body, weak hydrodynamic force and stable vertical sedimentary environment, which is not conducive to the formation of good matrix pore conditions. The development of favorable reservoir mainly depends on the degree of the later reformation of carbonate strata.
【作者單位】： 陜西延長(zhǎng)石油(集團(tuán))有限責(zé)任公司研究院;西安石油大學(xué)地球科學(xué)與工程學(xué)院;陜西延長(zhǎng)石油國(guó)際勘探開(kāi)發(fā)工程有限公司;
【基金】：陜西延長(zhǎng)石油(集團(tuán))有限責(zé)任公司科技研發(fā)項(xiàng)目(ycsy2014ky-A-10)~~
【分類(lèi)號(hào)】：P618.13

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