吉木萨尔凹陷芦草沟组页岩油录井响应及“甜点”快速评价技术

doi:10.3969/j.issn.1006-6535.2023.04.005

特种油气藏 ›› 2023, Vol. 30 ›› Issue (4): 35-43.DOI: 10.3969/j.issn.1006-6535.2023.04.005

吉木萨尔凹陷芦草沟组页岩油录井响应及“甜点”快速评价技术

熊雄¹, 肖佃师¹, 雷祥辉², 李映燕², 卢双舫¹, 王猛¹, 彭悦¹, 郭雪燚¹

1.中国石油大学华东,山东青岛 266580;
2.中国石油新疆油田分公司,新疆克拉玛依 834000

收稿日期:2022-11-17 修回日期:2023-05-04 出版日期:2023-08-25 发布日期:2023-09-18
通讯作者: 肖佃师(1981—),男,副教授,博士生导师,2003年毕业于大庆石油学院地球探测与信息技术专业,2013年毕业于东北石油大学矿产普查与勘探专业,获博士学位,现主要从事非常规油气储集层岩石物理评价方面的研究工作。
作者简介:熊雄(1997—),男,2020年毕业于龙岩学院地质工程专业,现为中国石油大学(华东)地质资源与地质工程专业在读硕士研究生,主要从事非常规油气储层分级评价方面的研究工作。
基金资助:
国家自然科学基金“压裂液在原位页岩气层中渗吸、滞留机理及影响”(41972139)

Response of Well Logging and "Sweet Spot" Rapid Evaluation Technology for Shale Oil in the Lucaogou Formation of Jimsar Sag

Xiong Xiong¹, Xiao Dianshi¹, Lei Xianghui², Li Yingyan², Lu Shuangfang¹, Wang Meng¹, Peng Yue¹, Guo Xueyi¹

1. China University of Petroleum (East China), Qingdao, Shandong 266580, China;
2. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

Received:2022-11-17 Revised:2023-05-04 Online:2023-08-25 Published:2023-09-18

摘要/Abstract

摘要： 混积型页岩油岩性复杂、矿物类型多、“甜点”横向变化快,常规测井对岩性、物性及含油性响应不敏感,而核磁测井需要岩石物理实验标定,解释周期长,尚缺乏有效的现场“甜点”快速评价技术。针对上述问题,以准噶尔盆地吉木萨尔凹陷芦草沟组页岩油储层为例,以核磁测井解释为依据,研究气测、碳酸盐矿物、钻时等录井资料对混积型页岩油岩性、物性和含油性的响应特征,明确内在联系,优选敏感参数,实现页岩油储层参数和“甜点”的快速评价。研究表明:混积型页岩油岩性、物性及含油饱和度在录井资料上均有明显响应,其中,碳酸盐含量和白云石占比能有效反映粉砂岩、云质粉砂岩、砂屑白云岩、泥晶白云岩和云质灰岩等主要岩性,碳酸盐含量、全烃/钻时对孔隙度反映敏感,碳酸盐含量、湿度比和全烃对含油饱和度敏感。基于录井敏感参数的孔隙度和含油饱和度解释模型,精度可达71.0%,与核磁测井相比,Ⅰ类油层“甜点”识别率超90%,能够实现随钻过程中页岩油“甜点”的快速准确评价。研究成果对提高混积型页岩油水平井“甜点”钻遇率及降本增效有指导意义。

关键词: 录井响应特征, 核磁测井, 水平井“甜点”, 混积型页岩油, 芦草沟组, 吉木萨尔

Abstract: The hybrid sedimentary shale oil is complex in lithology, with many mineral types and rapid lateral changes in the "sweet spot".The conventional logging is not sensitive to the lithology, physical properties and oil-bearing properties response, while the NMR logging requires petro-physical experimental calibration and long interpretation period, so there is a lack of effective on-site "sweet spot" rapid evaluation technology. To address the above problems, the shale oil reser-voir in the Lucaogou Formation of the Jimsar Sag of the Junggar Basin is taken as an example to study the response characteristics of gas logging, carbonate minerals, drilling time and other logs to the lithology, physical properties and oil-bearing properties of hybrid sedimentary shale oil based on the interpretation of NMR logging, so that the internal connection is clarified and sensi-tive parameters are selected to achieve the rapid evaluation of parameters and "sweet spots" of shale oil reservoir. The study shows that the lithology, physical properties and oil saturation of the hybrid sedimentary shale oil all have obvious responses on the logging data, among which, carbo-nate content and dolomite percentage can effectively reflect the main lithologies such as siltstone, dolomitic siltstone, psammitic dolomite, dolomicrite and dolomitic limestone, the carbonate con-tent and total hydrocarbon/drilling time are sensitive to the porosity, and the carbonate content, humidity ratio and total hydrocarbon are sensitive to the oil saturation. Based on the interpretation model of logging sensitive parameters such as porosity and oil saturation, the accuracy can reach 71.0%.Compared with the NMR logging, the identification rate of "sweet spot" of Class I oil formation is over 90%, thus achieving rapid and accurate evaluation of "sweet spot" of shale oil in the process of drilling. The results of the study are useful for improving the drilling catching rate of the "sweet spot" in horizontal wells of hybrid sedimentary shale oil and for reducing costs and increasing efficiency.

Key words: mud logging response characteristics, NMR logging, "sweet spot"in horizontal well, hybrid sedimentary shale oil, Lucaogou Formation, Jimsar

中图分类号:

TE122

熊雄, 肖佃师, 雷祥辉, 李映燕, 卢双舫, 王猛, 彭悦, 郭雪燚. 吉木萨尔凹陷芦草沟组页岩油录井响应及“甜点”快速评价技术[J]. 特种油气藏, 2023, 30(4): 35-43.

Xiong Xiong, Xiao Dianshi, Lei Xianghui, Li Yingyan, Lu Shuangfang, Wang Meng, Peng Yue, Guo Xueyi. Response of Well Logging and "Sweet Spot" Rapid Evaluation Technology for Shale Oil in the Lucaogou Formation of Jimsar Sag[J]. Special Oil & Gas Reservoirs, 2023, 30(4): 35-43.

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吉木萨尔凹陷芦草沟组页岩油录井响应及“甜点”快速评价技术

Response of Well Logging and "Sweet Spot" Rapid Evaluation Technology for Shale Oil in the Lucaogou Formation of Jimsar Sag

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