【摘要】：近年來,臺內(nèi)灘成為碳酸鹽巖油氣勘探的重點領(lǐng)域,并取得了一系列重大進展。本文以阿姆河盆地右岸地區(qū)中上侏羅統(tǒng)碳酸鹽巖臺內(nèi)灘氣田為例,在地震、測井、錄井、巖心、薄片及分析化驗等資料詳細研究的基礎(chǔ)上,對臺內(nèi)灘類型、沉積特征及儲層特征進行了分析,并重點研究了影響臺內(nèi)灘儲層發(fā)育及分布的控制因素。結(jié)果表明:(1)研究區(qū)臺內(nèi)灘主要包括生屑灘、內(nèi)碎屑灘、球粒灘、藻粒灘和鮞粒灘等5種類型。(2)剩余原生粒間孔,次生的粒間、粒內(nèi)溶孔及溶蝕孔洞為主要儲集空間,形成以孔隙型和孔洞型為主的兩類臺內(nèi)灘儲層。(3)儲層發(fā)育及分布明顯受古地貌、相對海平面變化及溶蝕作用等多種因素控制:(1)古地貌是臺內(nèi)灘發(fā)育的重要基礎(chǔ),在基底古隆起發(fā)育的古地貌高部位灘體連片分布,形成規(guī)模型臺內(nèi)灘儲集體;(2)相對海平面變化對臺內(nèi)灘儲層的發(fā)育層位及灘體類型具有重要的控制作用,臺內(nèi)灘儲層主要發(fā)育于高位域準層序組中上部,由下至上呈現(xiàn)出厚度增大、物性變好等特征,海平面高頻震蕩導(dǎo)致臺內(nèi)灘垂向上多期疊置;(3)包括同生期淡水淋濾及埋藏期溶蝕等多期次、多類型溶蝕作用是臺內(nèi)灘儲層形成的關(guān)鍵,次生溶蝕孔隙、孔洞成為臺內(nèi)灘重要的儲集空間,最終形成優(yōu)質(zhì)的孔隙(洞)型臺內(nèi)灘儲層。
[Abstract]:In recent years, Taitai beach has become the key field of carbonate oil and gas exploration, and has made a series of important progress. Taking the inner beach gas field of the Middle and Upper Jurassic carbonate platform in the right bank area of Amhe Basin as an example, based on the detailed study of seismic, logging, core, thin slice and analytical laboratory data, this paper makes a detailed study of the inner beach type of the platform. The sedimentary and reservoir characteristics are analyzed, and the controlling factors affecting the development and distribution of the reservoir in the platform are mainly studied. The results show that: (1) the inner beach of the study platform mainly includes 5 types: raw debris beach, inner debris beach, ball beach, algae beach and oolitic beach. (2) residual primary intergranular pore, secondary intergranular pore, and so on. Intragranular dissolution pores and corrosion pores are the main reservoir spaces, forming two types of reservoirs in the platform, which are mainly pore type and pore type. (3) the development and distribution of reservoirs are obviously affected by paleogeomorphology. Relative sea-level change and dissolution are controlled by many factors such as: (1) Palaeogeomorphology is an important basis for the development of the platform, and the beach body is distributed in the high part of the paleo-geomorphology developed by the basement paleo-uplift, forming the beach reservoir in the model platform; (2) the change of relative sea level plays an important role in controlling the development horizon and beach type of Taitang reservoir. The reservoir mainly develops in the middle and upper parts of the high-level quasi-sequence formation, showing the characteristics of increasing thickness and improving physical properties from the bottom to the top, and so on. High-frequency sea-level oscillation leads to vertical overlaying of the beach in the platform; (3) it includes many times, such as fresh water leaching in syngenetic period and dissolution in buried period. Multi-type dissolution is the key to formation of Taitantan reservoir, secondary dissolution pore and pore become important reservoir space in Taitai beach, and the secondary dissolution pore is the key to the formation of Taitang reservoir, and the secondary dissolution pore is the most important reservoir space. Finally, the formation of high-quality pore (hole)-type platform beach reservoir.
【作者單位】： 振華石油控股有限公司;中國石油勘探開發(fā)研究院;中國石油天然氣勘探開發(fā)公司;
【基金】：國家重大科技專項“中亞地區(qū)含氣盆地成藏規(guī)律與勘探技術(shù)”(2011ZX05029-003) 中國石油天然氣集團公司科學(xué)研究與技術(shù)開發(fā)項目“阿姆河右岸鹽下天然氣分布規(guī)律與區(qū)帶評價”(2013D-0904)
【分類號】：P618.13
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本文編號：2452328