玛南斜坡风城组油气成藏条件及主控因素

doi:10.11885/j.issn.1674-5086.2021.07.08.01

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (4): 72-84.DOI: 10.11885/j.issn.1674-5086.2021.07.08.01

玛南斜坡风城组油气成藏条件及主控因素

卞保力¹, 刘海磊¹, 蒋中发¹, 王学勇¹, 丁修建²

1. 中国石油新疆油田公司勘探开发研究院, 新疆克拉玛依 834000;
2. 中国石油大学(华东)地球科学与技术学院, 山东青岛 266580

收稿日期:2021-07-08 出版日期:2023-08-10 发布日期:2023-07-18
通讯作者: 卞保力,E-mail:bbaoli@petrochina.com.cn
作者简介:卞保力,1983年生,男,汉族,山东临沂人,工程师,硕士,主要从事石油与天然气地质方面的研究工作。E-mail:bbaoli@petrochina.com.cn;刘海磊,1986年生,男,汉族,山东临朐人,工程师,硕士,主要从事从事油气地质勘探方面的研究工作。E-mail:lhlei66@petrochina.com.cn;蒋中发,1994年生,男,汉族,四川成都人,工程师,硕士,主要从事有机地球化学、油气地质勘探等方面的研究工作。E-mail:jzfkts@petrochina.com.cn;王学勇,1990年生,男,汉族,河南兰考人,工程师,主要从事油气勘探方面的研究工作。E-mail:sxytwxy1@petrochina.com.cn;丁修建,1986年生,男,汉族,山东台儿庄人,副教授,博士,主要从事油气藏形成与分布方面的研究工作。E-mail:dingxj@upc.edu.cn
基金资助:
中国石油天然气股份公司"十四五"重大前瞻性基础性重大科技项目(2021DJ0206)

Accumulation Conditions and Main Controlling Factors of Fengcheng Formation Reservoirs in the South Slope of Mahu Sag

BIAN Baoli¹, LIU Hailei¹, JIANG Zhongfa¹, WANG Xueyong¹, DING Xiujian²

1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
2. School of Geosciences, China University of Petroleum, Qingdao, Shangdong 266580, China

Received:2021-07-08 Online:2023-08-10 Published:2023-07-18

摘要/Abstract

摘要： 近年来，准噶尔盆地玛湖凹陷南斜坡（玛南斜坡）二叠系风城组岩性勘探取得突破，烃源岩、储集岩等油气成藏条件需重新认识，岩性油藏带试油获纯油层主控因素亟待查明。针对以上问题，对近年探井开展了地球化学及沉积储层分析测试，综合录井、测井及地震资料，取得了以下认识： 1）新钻井在风城组扇三角洲外前缘相带钻遇一定厚度的Ⅱ型成熟好烃源岩，揭示了玛南斜坡同样发育风城组烃源岩。2）风城组扇三角洲平原相带发育块状砂砾岩，泥岩盖层欠发育，扇三角洲前缘相带发育泥岩盖层，研究区储集岩均为特低孔、特低渗储层。3）划分了4个成藏带，扇三角洲平原油藏带为高部位块状砂砾岩，下倾方向“水带”成因为平原相油藏带不整合盖层封堵不严，扇三角洲内前缘油藏带纯油层受局部泥岩盖层发育控制，扇三角洲外前缘油藏带泥岩盖层普遍发育，更加有利，由此优选了289 km²勘探有利区，指导后续勘探部署。

关键词: 玛南斜坡, 风城组, 烃源岩, 盖层, 成藏条件

Abstract: Recently, breakthroughs have been made in oil and gas exploration of Fengcheng Formation in the south slope of Mahu Sag, the conditions of hydrocarbon accumulation such as source rock and reservoir rock need to be re-recognized, and the main controlling factors of pure oil reservoir in lithologic reservoir zone need to be identified. In view of the above problems, geochemical and sedimentary reservoir testing were carried out for exploration wells in recent years, and logging, and seismic data were integrated, and the results show: 1) recently drilled wells in the study area in the outer front of fan delta facies mature and good type II hydrocarbon source rock reach of certain thickness, revealing that Fengcheng Formation source rock also exist in study area. 2) the plain facies of fan delta develops massive glutenite, and there is no mudstone cap layer inside, and the front facies of fan delta develops mudstone cap layer inside, which can be used as local cap layer; reservoir rocks are extra-low porosity and extra-low permeability reservoirs. 3) four hydrocarbon accumulation belts are identified, and massive glutenite is distributed in plain facies reservoir belt, and downdip direction water hose is formed due to the unconformity of the plain facies reservoir zone cap layer sealing; pure oil layers in fan delta front reservoirs are controlled by regional mudstone cap rock development, and outer frontal shale cap rock develops generally. We thus select a 289 km² area favorable for exploration, guiding further exploration and deployment.

Key words: south slope of Mahu Sag, Fengcheng Formation, hydrocarbon source rock, cap rock, accumulation conditions

中图分类号:

TE122

卞保力, 刘海磊, 蒋中发, 王学勇, 丁修建. 玛南斜坡风城组油气成藏条件及主控因素[J]. 西南石油大学学报(自然科学版), 2023, 45(4): 72-84.

BIAN Baoli, LIU Hailei, JIANG Zhongfa, WANG Xueyong, DING Xiujian. Accumulation Conditions and Main Controlling Factors of Fengcheng Formation Reservoirs in the South Slope of Mahu Sag[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(4): 72-84.

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玛南斜坡风城组油气成藏条件及主控因素

Accumulation Conditions and Main Controlling Factors of Fengcheng Formation Reservoirs in the South Slope of Mahu Sag

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