Title: Sedimentary Facies Types and Depositional Characteristics of Triassic in the 9th Area of Xiazijie Oilfield
Abstract: Water flooding efficiency was poor and recovery factor was low in triassic oil reservoir of the 9th area cause sedimentary system and reservoir distribution were unclearly understood.Based on modern sedimentological theory,the article researched the depositional characteristics of Triassic oil reservoir in the 9th area deeply and identified several sedimentary facies types:alluvial fan facies、fan delta facies and lacustrine facies by fully applying the core、drilling and logging data,of which the fan delta facies is the most important facies of Triassic,the fan delta sedimentary assembled can be identified six microfacies: mudrockflow、 braided channel、diffusion、debris flow、subaqueous distributary channel、subaqueous interdistributary channel microfacies.Fan delta facies can be identified distinctly by its coarse grain and poor sorting sediments and crimson-dark gray-gray green mudstone、deposit assemblage of gravity flow and traction current,developing cross bedding、parallel bedding and imbricate arrangement gravels.The article expounds Characteristics of Fan Delta sediments in the 9th Area of Xiazijie Oilfield from its distribution、recognition symbols and characteristics of microfacies and ect,so that it provides basis for progressive exploration developing and old producer reviewing.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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