岩屑的有机酸溶蚀实验及验证——以渤中凹陷CFD6-4油田东营组为例

doi:10.7623/syxb202007006

石油学报 ›› 2020, Vol. 41 ›› Issue (7): 841-852.DOI: 10.7623/syxb202007006

岩屑的有机酸溶蚀实验及验证——以渤中凹陷CFD6-4油田东营组为例

曹英权^1,2, 王清斌³, 曲希玉¹, 王冠民¹, 苗长盛^4,5, 高媛^1,6, 陈思芮¹

1. 中国石油大学(华东)地球科学与技术学院山东青岛 266580;
2. 中法渤海地质服务有限公司天津 300452;
3. 中海石油(中国)有限公司天津分公司天津 300452;
4. 长春工程学院勘查与测绘学院吉林长春 130021;
5. 中国石油化工股份有限公司东北油气分公司吉林长春 130061;
6. 中国石油化工股份有限公司华东油气分公司泰州采油厂江苏泰州 225300

收稿日期:2019-04-10 修回日期:2020-03-06 出版日期:2020-07-25 发布日期:2020-08-08
通讯作者: 王清斌,男,1975年1月生,1998年获西北大学学士学位,2007年获吉林大学硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油勘探研究院高级工程师,主要从事石油天然气储层、沉积方面的研究。Email:wangqb@cnooc.com.cn
曲希玉,男,1977年9月生,2001年获大庆石油学院学士学位,2007年获吉林大学博士学位,现为中国石油大学(华东)副教授,主要从事流体-岩石相互作用,储层及沉积学方面的研究。Email:quxiyu@upc.edu.cn
作者简介:曹英权,男,1994年2月生,2016年获西南石油大学学士学位,2019年获中国石油大学(华东)硕士学位,现为中法渤海地质服务有限公司地质师,主要从事录井资料解释及储层地质学方向的研究。Email:caoyq@cfbgc.com
基金资助:
国家科技重大专项（2016ZX05024-003-006和2017ZX05009-002）资助。

A dissolution experiment of organic acid of cuttings and its verification: a case study of the Dongying Formation of the CFD6-4 oilfield,Bozhong sag

Cao Yingquan^1,2, Wang Qingbin³, Qu Xiyu¹, Wang Guanmin¹, Miao Changsheng^4,5, Gao Yuan^1,6, Chen Sirui¹

1. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China;
2. China-France Bohai Geoservices Co., Ltd, Tianjin 300452, China;
3. Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin 300452, China;
4. School of Prospecting and Surveying Engineering, Changchun Institute of Technology, Jilin Changchun 130021, China;
5. Sinopec Northeast Oil and Gas Branch, Jilin Changchun 130061, China;
6. Taizhou Oil Production Plant, Sinopec East China Oil and Gas Company, Jiangsu Taizhou 225300, China

Received:2019-04-10 Revised:2020-03-06 Online:2020-07-25 Published:2020-08-08

摘要/Abstract

摘要：

以渤中凹陷CFD6-4油田东营组岩屑为研究对象，在3种温度和压力条件下进行有机酸溶蚀模拟实验，比较不同类型岩屑的溶蚀作用强弱，并探讨溶蚀差异性的原因。研究结果表明：①不同类型岩屑中的溶蚀矿物成分主要是长石，其次为石英；②质量损失量、pH值变化及溶出离子质量浓度均随温度增高而增大，说明岩屑的溶蚀作用与温度呈正相关，表面微观形貌观察也证实了这一现象；③最易溶蚀的岩屑类型为流纹岩、安山岩，其次为花岗岩和片麻岩，板岩及片岩较不易溶蚀，千枚岩最不易溶蚀，造成溶蚀差异的主要原因是岩性、岩相以及易溶物质的含量；④利用CFD6-4油田东营组岩屑溶蚀情况及其与储层物性的关系，验证了实验结果的可信性。由实验结果和研究区实际情况可知，以流纹岩和安山岩为主要岩屑类型的地区，在酸性流体作用下更易形成次生溶孔从而改善储层物性。

关键词: 岩屑, 有机酸, 溶蚀实验, 渤中凹陷, CFD6-4油田

Abstract:

Taking the cuttings of Dongying Formation in the CFD6-4 oilfield in Bozhong sag as the research object, the simulation experiments of organic acid dissolution in three kinds of temperature and pressure conditions were performed to compare the intensity of dissolution of different types of cuttings and explore the causes of differences in dissolution. The research results show that:(1) the dissolved minerals in different types of cuttings are mainly feldspar, followed by quartz; (2) the loss quantity of mass, pH value change and mass concentration of dissolved ion all increase with the increasing temperature, indicating the dissolution of cuttings are positively correlated with temperature, and the observation on the surface microtopography also confirms this phenomenon; (3) the most easily dissolvable cuttings are rhyolite and andesite, followed by granite and gneiss. Slate and schist are less prone to dissolution. Phyllite is the least susceptible to dissolution. The difference in dissolution is mainly caused by lithology, lithofacies and the content of soluble substances; (4) the validity of the experimental results is verified by the dissolution of cuttings from Dongying Formation of the CFD6-4 oilfield and its relationship with the reservoir physical properties. According to the experimental results and the actual situation in the study area, it can be found that in the areas where the lithology is dominated by rhyolite and andesite, secondary solution pores are more likely to form under the action of acidic fluids to improve the reservoir physical properties.

Key words: cuttings, organic acid, dissolution experiment, Bozhong sag, CFD6-4 oilfield

中图分类号:

TE122.2

曹英权, 王清斌, 曲希玉, 王冠民, 苗长盛, 高媛, 陈思芮. 岩屑的有机酸溶蚀实验及验证——以渤中凹陷CFD6-4油田东营组为例[J]. 石油学报, 2020, 41(7): 841-852.

Cao Yingquan, Wang Qingbin, Qu Xiyu, Wang Guanmin, Miao Changsheng, Gao Yuan, Chen Sirui. A dissolution experiment of organic acid of cuttings and its verification: a case study of the Dongying Formation of the CFD6-4 oilfield,Bozhong sag[J]. Acta Petrolei Sinica, 2020, 41(7): 841-852.

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岩屑的有机酸溶蚀实验及验证——以渤中凹陷CFD6-4油田东营组为例

A dissolution experiment of organic acid of cuttings and its verification: a case study of the Dongying Formation of the CFD6-4 oilfield,Bozhong sag

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