四川盆地蓬莱气区震旦系灯影组二段储层特征及其控制因素

doi:10.3969/j.issn.1006-6535.2024.02.006

特种油气藏 ›› 2024, Vol. 31 ›› Issue (2): 47-56.DOI: 10.3969/j.issn.1006-6535.2024.02.006

四川盆地蓬莱气区震旦系灯影组二段储层特征及其控制因素

徐少立¹, 马奎¹, 杨强¹, 谢长琼², 张新¹, 严威¹, 武鲁亚¹, 王文之¹

1.中国石油西南油气田分公司,四川成都 610041;
2.中国核工业二四建设有限公司,四川绵阳 621000

收稿日期:2023-04-18 修回日期:2023-12-16 出版日期:2024-04-25 发布日期:2024-07-26
通讯作者: 马奎(1988—),男,高级工程师,2011年毕业于长江大学矿产普查与勘探专业,2017年毕业于中国石油勘探开发研究院地质资源与地质工程专业,获博士学位,现从事碳酸盐岩油气成藏工作。
作者简介:徐少立(1996—),男,工程师,2018年毕业于西南石油大学资源勘查工程专业,2021年毕业于中国地质大学(北京)矿产普查与勘探专业,获硕士学位,现从事油气地质勘探工作。
基金资助:
中国石油重大科技专项“海相碳酸盐岩油气规模增储上产与勘探开发技术研究”(2023ZZ16)

Reservoir Characteristics of the second Member of Sinian Dengying Formation in Penglai Gas Area of Sichuan Basin and Their Controlling Factors

Xu Shaoli¹, Ma Kui¹, Yang Qiang¹, Xie Changqiong², Zhang Xin¹, Yan Wei¹, Wu Luya¹, Wang Wenzhi¹

1. PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610041, China;
2. China Nuclear Industry No. 24 Construction Co., Ltd., Mianyang, Sichuan 621000, China

Received:2023-04-18 Revised:2023-12-16 Online:2024-04-25 Published:2024-07-26

摘要/Abstract

摘要： 蓬莱气区震旦系灯影组天然气勘探取得重大突破,单井产量屡创新高,显示了蓬莱气区灯二段良好的规模资源潜力。但目前该区沉积、储层特征及其主控因素仍未明确,优质储层预测存在极大困难,严重阻碍了下步勘探部署和储量升级。在此背景下,为进一步深化蓬莱气区沉积储层特征研究并揭示优质储层主控因素,利用最新的岩电、地震及分析测试资料,对蓬莱气区灯二段开展新一轮沉积储层研究。结果表明:灯二段储集岩性为丘滩相凝块、砂屑云岩,储集空间包括孔隙、溶洞及裂缝三大类,储层展布纵向上差异大,平面上连续性较强。优质储层发育受沉积相带、岩溶作用及成岩作用的共同控制,其中,沉积相带是灯二段优质储层形成的基础;岩溶作用决定了储层储集性能;后期成岩作用是影响灯二段优质储层形成的重要因素。灯二段整体含气性良好,发育多个大型岩性圈闭,研究认为岩溶改造下的丘滩相岩性圈闭体是下步勘探的有利目标区带,亦是盆地天然气万亿方资源增储上产新阵地。该研究为明确蓬莱气区灯二段沉积、储层特征及其主控因素提供了基础材料与研究实例,以期为后续勘探开发工作提供借鉴。

关键词: 储层特征, 岩溶作用, 主控因素, 白云岩, 蓬莱气区, 四川盆地

Abstract: Significant breakthroughs have been made in the exploration of natural gas in the second Member of the Sinian Dengying Formation in Penglai gas area, with single well production reaching new highs repeatedly, demonstrating the excellent scale reserve resources of Dengying Formation in Penglai gas area. However, the sedimentary and reservoir characteristics and their main controlling factors in the area are not yet clarified, and there are great difficulties in predicting high-quality reservoirs, which seriously hinder the next exploration deployment and reserve upgrading. In this context, in order to further deepen the study of sedimentary reservoir characteristics in Penglai gas area and reveal the main controlling factors of high quality reservoirs, a new round of sedimentary reservoirs research is carried out on the second Member of Penglai gas area using the latest rock-resistivity, seismic and testing data. The results show that the reservoir lithologies of the second Member of Dengying Formation are thrombolites and doloarenites of mound-shoal facies. The reservoir spaces include pores, karst caves and fractures. The distribution of the reservoirs varies significantly in the vertical direction, and the continuity is strong in the plane. Sedimentary facies belts, karst, and diagenesis jointly control the high-quality reservoirs. Among them, sedimentary facies belts are the basis for the formation of high-quality reservoirs in the second Member of Dengying Formation; karst determines the reservoir property. Late diagenesis is an essential factor affecting the formation of high-quality reservoirs in the second Member of Dengying Formation. The overall gas content of the second Member of Dengying Formation is good, with the development of multiple large lithological traps. Research suggests that the lithological trap bodies of mound-shoal facies under karst reformation are favorable target areas for further exploration and also new positions for increasing natural gas reserves and production in the basin by trillions of cubic meters. This study provides a foundation and research examples for clarifying the sedimentary and reservoir characteristics of the second Member of Penglai gas field and its main controlling factors to provide a reference for subsequent exploration and development work.

Key words: reservoir characteristic, karst, main controlling factor, dolomite, Penglai gas area, Sichuan Basin

中图分类号:

TE122

徐少立, 马奎, 杨强, 谢长琼, 张新, 严威, 武鲁亚, 王文之. 四川盆地蓬莱气区震旦系灯影组二段储层特征及其控制因素[J]. 特种油气藏, 2024, 31(2): 47-56.

Xu Shaoli, Ma Kui, Yang Qiang, Xie Changqiong, Zhang Xin, Yan Wei, Wu Luya, Wang Wenzhi. Reservoir Characteristics of the second Member of Sinian Dengying Formation in Penglai Gas Area of Sichuan Basin and Their Controlling Factors[J]. Special Oil & Gas Reservoirs, 2024, 31(2): 47-56.

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四川盆地蓬莱气区震旦系灯影组二段储层特征及其控制因素

Reservoir Characteristics of the second Member of Sinian Dengying Formation in Penglai Gas Area of Sichuan Basin and Their Controlling Factors

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