致密油水平井温度剖面影响规律研究

doi:10.13809/j.cnki.cn32-1825/te.2023.05.015

油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (5): 676-685.doi: 10.13809/j.cnki.cn32-1825/te.2023.05.015

致密油水平井温度剖面影响规律研究

罗红文¹(),张琴¹(),李海涛¹,向雨行¹,李颖¹,庞伟²,刘畅¹,于皓¹,王亚宁¹

1.西南石油大学油气藏地质及开发工程国家重点实验室, 四川成都 610500
2.中国石化石油工程技术研究院，北京 102299

收稿日期:2022-05-23 发布日期:2023-11-01 出版日期:2023-10-26
通讯作者: 张琴（1999—），女，在读硕士研究生，现从事油气藏温度动态模拟和分布式光纤监测解释等方面的研究。地址：四川省成都市新都区新都大道8号，邮政编码：610500。E-mail: zhangq9969@163.com
作者简介:罗红文（1990—），男，博士，助理研究员，现从事油气藏温度动态模拟、水平井产出剖面评价及分布式光纤监测解释方面的研究。地址：四川省成都市新都区新都大道8号，邮政编码：610500。E-mail: rojielhw@163.com
基金资助:
中国博士后科学基金项目“页岩气水平井多场耦合热变规律及产出剖面反演方法研究”(2021M702721);四川省自然科学基金项目“页岩气水平井多场耦合热变规律及产出剖面反演方法研究”(2022NSFSC0993);中国石油科技创新基金研究项目“水平井压裂声波响应机理实验及DAS大数据智能反演方法研究”(2022DQ02-0305)

Influence law of temperature profile for horizontal wells in tight oil reservoirs

LUO Hongwen¹(),ZHANG Qin¹(),LI Haitao¹,XIANG Yuxing¹,LI Ying¹,PANG Wei²,LIU Chang¹,YU Hao¹,WANG Yaning¹

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2. SINOPEC Research Institute of Petroleum Engineering Co., Ltd, Beijing 102299, China

Received:2022-05-23 Online:2023-11-01 Published:2023-10-26

摘要/Abstract

摘要：

由于目前缺乏可靠的致密油水平井温度剖面预测模型、对致密油水平井温度剖面影响规律认识不清，导致基于分布式光纤的致密油水平井产出剖面定量评价仍是一项技术难题。鉴于此，创建了考虑多种微热效应的致密油水平井温度剖面预测模型，探究了井筒温度剖面受不同单因素变化的影响，通过正交试验，确定不同因素的敏感性由强到弱依次为：产量、裂缝半长、储层渗透率、井筒直径、水平倾角、裂缝导流能力、储层总导热系数（Q>x_f>K>D>θ>F_CD>K_t），明确了影响致密油水平井温度剖面的主控因素为裂缝半长和储层渗透率。研究成果为定量分析致密油水平井井筒流动剖面、人工裂缝等参数提供了可用温度模型和理论支撑。

关键词: 温度剖面, 影响规律, 温度剖面预测模型, 致密油水平井, 分布式光纤温度传感器

Abstract:

The challenge of reliably predicting temperature profiles in horizontal wells in tight oil reservoirs, coupled with an incomplete understanding of the factors influencing these profiles, has hindered the quantitative interpretation of tight oil horizontal well production using distributed optical fiber technology. To address this issue, a comprehensive model has been developed to estimate temperature profiles in horizontal wells in tight oil reservoirs, accounting for various microthermal effects. The temperature profiles of horizontal wells in tight oil reservoir under different single factors were simulated and analyzed. Then, through orthogonal experiment analysis, it demonstrates that the sensitivity of different factors from strong to weak is production rate, fracture half-length, reservoir permeability, wellbore diameter, horizontal inclination angle, fracture conductivity, and total reservoir thermal conductivity（Q>x_f>K>D>θ>F_CD>K_t）. It is worth noting that fracture half-length and formation permeability emerged as the primary factors influencing the temperature profile of horizontal wells in tight oil reservoirs. The research results provide available basic models and theoretical support for quantitative interpretation of production profile and artificial fracture parameters for horizontal wells in tight oil reservoir.

Key words: temperature profile, influence law, temperature profile prediction model, horizontal well in tight oil reservoir, distributed tempreture sensing（DTS）

中图分类号:

TE355

罗红文,张琴,李海涛等. 致密油水平井温度剖面影响规律研究[J]. 油气藏评价与开发, 2023, 13(5): 676-685.

Hongwen LUO,Qin ZHANG,Haitao LI, et al. Influence law of temperature profile for horizontal wells in tight oil reservoirs[J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 676-685.

图/表 14

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参考文献 22

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参数类型	参数名称	参数取值
储层参数	储层长度/m	1 500
	储层宽度/m	500
	储层厚度/m	20
	储层中深/m	2 150
	孔隙度/%	15
	水平渗透率/10^-3μm²	12
	垂向渗透率/10^-3μm²	1
	地面温度/℃	20
	地温梯度/(℃ /m)	0.03
	储层温度/℃	80
	地层压力/MPa	20
储层岩石热力学参数	岩石密度/(kg/m³⁾	2 380
	岩石热容/[J/(kg·℃)]	845
	总导热系数/[J/(m·s·℃)]	3.46
井筒参数	水平长度/m	810
	井筒直径/m	0.2
	套管外径/m	0.14
	套管内径/m	0.12
	井壁粗糙度/m	0.001 5
	套管导热系数/[J/(m·s·℃)]	12
	水泥环导热系数/[J/(m·s·℃)]	6.9
流体物性	原油密度/[ kg/m³]	900
	原油黏度/MPa·s	2
	原油热容/[J/(kg·℃)]	2 000
	原油膨胀系数/(10^-4/℃)	4
	原油体积系数/(m³/m³)	1.37
	原油热导率/[W/(m·℃)]	0.14
	地层水密度/[kg/m³]	1 000
	地层水黏度/MPa·s	0.1
	地层水热容/[J/(kg·℃)]	4230
	地层水热膨胀系数/(10^-4/℃)	2
	地层水体积系数/(m³/m³)	1.02

参数类型	参数名称	参数取值
储层参数	储层长度/m	1 000
	储层宽度/m	500
	储层厚度/m	20
	储层中深/m	1 350
	孔隙度/%	15
	水平渗透率/10^-3μm²	20
	垂向渗透率/10^-3μm²	2
	地面温度/℃	20
	地温梯度/(℃ /m)	0.03
	储层温度/℃	80
	地层压力/MPa	20
储层岩石热力学参数	岩石密度/(kg/m³⁾	2 380
	岩石热容/[J/(kg·℃)]	845
	总导热系数/[J/(m·s·℃)]	3.46
井筒参数	水平长度/m	700
	井筒直径/m	0.2
	套管外径/m	0.14
	套管内径/m	0.12
	井壁粗糙度/m	0.001 5
	套管导热系数/[J/(m·s·℃)]	12
	水泥环导热系数/[J/(m·s·℃)]	6.9
流体物性	原油密度/[ kg/m³]	900
	原油黏度/mPa·s	2
	原油热容/[J/(kg·℃)]	2 000
	原油膨胀系数/(10^-4/℃)	4
	原油体积系数/(m³/m³)	1.37
	原油热导率/[W/(m·℃)]	0.14
	地层水密度/[kg/m³]	1 000
	地层水黏度/mPa·s	0.1
	地层水热容/[J/(kg·℃)]	4 230
	地层水热膨胀系数/(10^-4/℃)	2
	地层水体积系数/(m³/m³)	1.02

因素名	Q/（m³/d）	K/10^-3μm²	K_t/[J/(m·s·℃)]	x_f/m	F_CD/（μm²·cm）	D/m	θ/（°）
水平1	18	20	3.0	40	10	0.10	1
水平2	20	30	3.5	60	15	0.15	3
水平3	22	40	4.0	80	20	0.20	5

实验编号	Q	K	K_t	x_f	F_CD	D	θ	平均温度差，℃
实验1	1	1	1	1	1	1	1	0.294
实验2	1	2	2	2	2	2	2	0.287
实验3	1	3	3	3	3	3	3	0.281
实验4	2	1	1	2	2	3	3	0.314
实验5	2	2	2	3	3	1	1	0.341
实验6	2	3	3	1	1	2	2	0.323
实验7	3	1	2	1	3	2	3	0.309
实验8	3	2	3	2	1	3	1	0.271
实验9	3	3	1	3	2	1	2	0.274
实验10	1	1	3	3	2	2	1	0.318
实验11	1	2	1	1	3	3	2	0.261
实验12	1	3	2	2	1	1	3	0.253
实验13	2	1	2	3	1	3	2	0.331
实验14	2	2	3	1	2	1	3	0.315
实验15	2	3	1	2	3	2	1	0.269
实验16	3	1	3	2	3	1	2	0.293
实验17	3	2	1	3	1	2	3	0.369
实验18	3	3	2	1	2	3	1	0.308
均值1	0.302	0.31	0.297	0.282	0.003	0.295	0.307
均值2	0.281	0.307	0.305	0.315	0.295	0.313	0.303
均值3	0.319	0.285	0.3	0.305	0.306	0.290	0.289
极差（R）	0.041	0.030	0.007	0.035	0.011	0.020	0.015

致密油水平井温度剖面影响规律研究

Influence law of temperature profile for horizontal wells in tight oil reservoirs

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