岩心分段密封及逸散轻烃采集测定技术与初步应用

鲍云杰; 李志明; 黎茂稳; 钱门辉; 刘鹏; 徐二社; 陶国亮; 杨振恒

doi:10.11781/sysydz202003422

岩心分段密封及逸散轻烃采集测定技术与初步应用

doi: 10.11781/sysydz202003422

鲍云杰^{1, 2, 3, 4,},
李志明^{1, 2, 3, 4},
黎茂稳^{1, 2, 3, 4},
钱门辉^{1, 2, 3, 4},
刘鹏^{1, 2, 3, 4},
徐二社^{1, 2, 3, 4},
陶国亮^{1, 2, 3, 4},
杨振恒^{1, 2, 3, 4}

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
中国石油化工集团公司油气成藏重点实验室, 江苏无锡 214126
3.
页岩油气富集机理与有效开发国家重点实验室, 江苏无锡 214126
4.
国家能源页岩油研发中心, 江苏无锡 214126

基金项目:

国家科技重大专项 2017ZX05049001

国家科技重大专项 2017ZX05036002

国家自然科学基金石油化工联合基金 U1663202

详细信息

作者简介:
鲍云杰(1963-), 男, 硕士, 高级工程师, 从事测试技术与页岩油气评价研究。E-mail: baoyj.syky@sinopec.com

中图分类号: TE135
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- 被引次数: 0
出版历程
- 收稿日期: 2019-10-08
- 修回日期: 2020-03-18
- 刊出日期: 2020-05-28

Segmented sealing of cores and collection and test of escaped light hydrocarbons and its preliminary application

BAO Yunjie^{1, 2, 3, 4
,},
LI Zhiming^{1, 2, 3, 4},
LI Maowen^{1, 2, 3, 4},
QIAN Menhui^{1, 2, 3, 4},
LIU Peng^{1, 2, 3, 4},
XU Ershe^{1, 2, 3, 4},
TAO Guoliang^{1, 2, 3, 4},
YANG Zhenheng^{1, 2, 3, 4}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China
3.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
4.
State Energy Center for Shale Oil Research and Development, Wuxi, Jiangsu 214126, China

摘要

摘要: 含油气岩心轻烃逸散具有普遍性，岩心出筒后轻烃收集及其逸散差异性的表征技术和方法尚有提升空间。以专利"一种岩心分段式密封装置及其使用方法（2013101681829）"技术为核心，研究设计了岩心分段密封装置及轻烃采集测定方法。装置具有筒状结构，内置数个环状密封圈，能够将置入其中的岩心进行非破坏式的分段密封，形成数个互不连通的密闭空间以存储岩心逸散的轻烃；装置配套了气体采样泵、便携式甲烷检测仪以及气相色谱仪等辅助设备，用于对不同密闭空间中的轻烃进行采样以及逸散轻烃浓度和组分测定，建立了密闭空间中逸散轻烃浓度转换为逸散量的方法。初步实验应用表明，利用该装置及方法能够获取岩心出筒后逸散的轻烃，进而表征岩心轴向不同部位轻烃逸散量及其组分的差异性，结合岩性及物性等资料，为页岩油气层系非均质性评价及其主控因素研究提供依据。
- 岩心 /
- 分段密封 /
- 逸散轻烃 /
- 测定装置 /
- 含气量 /
- 含油率
Abstract: Light hydrocarbons easily escape from hydrocarbon-bearing cores when they are recovered from wellbores, which makes it necessary to improve the methods for collecting light hydrocarbons from cores and characterizing the differences of hydrocarbon losses. A new method for the segmented sealing of cores and the collection and test of light hydrocarbons was developed based on the patent "a segmented sealing device for cores and its instructions(2013101681829)". The device has a cylindrical structure with several annular seals built in, which can non-destructively seal the core inserted therein to form several closed spaces that are not interconnected to store light hydrocarbons escaping from the core. The device is matched with auxiliary equipment such as gas sampling pumps, portable methane detectors, and gas chromatographs, which are used to sample light hydrocarbons in different confined spaces to determine the concentration and composition of mobile light hydrocarbons. The concentration of escaped light hydrocarbons in confined spaces can be converted to escape quantity. Preliminary applications show that the device and method can be used to obtain light hydrocarbons that escape after the cores are recovered from the wellbores, and then to characterize the differences in the amount and components of light hydrocarbons escaping from different parts of the core in an axial direction. Combined with lithology and physical properties, it provides a basis for the evaluation of shale oil and gas formation heterogeneity and its main controlling factors.
- core /
- segmented seal /
- escaped light hydrocarbon /
- measuring device /
- gas content /
- oil content

HTML全文

图 1 密封单元组成

Figure 1. Composition of sealing units

下载: 全尺寸图片幻灯片

图 2 A井部分井段录井图

Figure 2. Logging diagram of some sections in well A

下载: 全尺寸图片幻灯片

图 3 孔隙度与热解S₁交会图

Figure 3. Porosity vs. S₁

下载: 全尺寸图片幻灯片

图 4 孔隙度与荧光含油率交会图

Figure 4. Porosity vs. fluorescent oil content

下载: 全尺寸图片幻灯片

图 5 荧光含油率与热解S₁、逸散气量对应关系

Figure 5. Fluorescent oil content vs. S₁ and escaped gas amount

下载: 全尺寸图片幻灯片

图 6 孔隙度与24 h逸散气量交会图

Figure 6. Porosity vs. escaped gas amount (24 h)

下载: 全尺寸图片幻灯片

表 1 不同岩性岩心孔隙度及逸散轻烃组分

Table 1. Composition of escaped light hydrocarbon from core samples with different porosities and lithology

岩性	孔隙度/%	组分/%
岩性	孔隙度/%	C₁	C₂	C₃	iC₄	nC₄	iC₅	nC₅
灰黑色、黑色泥页岩	1~9	80.46	6.52	8.54	1.59	2.25	0.49	0.15
灰色、紫红色(泥质)粉砂岩	< 3	98.76	1.24	0	0	0	0	0
灰黑色粉砂岩	3~6	92.63	4.84	2.04	0.06	0.43	0	0
灰色(泥质)粉砂岩、细砂岩	> 6	72.16	11.65	12.14	1.29	2.55	0.21	0

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