丹凤场气田致密砂岩气水渗流特征及影响因素

doi:10.13809/j.cnki.cn32-1825/te.2022.02.011

油气藏评价与开发 ›› 2022, Vol. 12 ›› Issue (2): 356-364.doi: 10.13809/j.cnki.cn32-1825/te.2022.02.011

丹凤场气田致密砂岩气水渗流特征及影响因素

杨玉斌¹(),肖文联¹(),韩建²,苟玲²,李闽¹,周克明³,欧阳沐鲲²,陈黎²

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.中国石油西南油气田分公司重庆气矿,重庆 400021
3.中国石油西南油气田勘探开发研究院,四川成都 610213

收稿日期:2021-03-10 出版日期:2022-04-26 发布日期:2022-05-07
通讯作者: 肖文联 E-mail:1256360921@qq.com;joshxiao@163.com
作者简介:杨玉斌（1994—）,男,在读博士研究生,主要从事非常规油气渗流物理及其在油气田开发中的应用研究工作。地址：四川省成都市新都区新都大道8号西南石油大学,邮政编码：610500。E-mail: 1256360921@qq.com
基金资助:
国家自然科学基金面上项目“致密砂岩气藏岩石非线性有效应力耦合机制研究”(51874248);国家自然科学基金联合基金重点支持项目“黏度可控的原位增黏体系构建及高效驱油机理研究”(U19B2010)

Gas-water flow characteristics and influencing factors of tight sandstone in Danfengchang Gas Field

YANG Yubin¹(),XIAO Wenlian¹(),HAN Jian²,GOU Ling²,LI Min¹,ZHOU Keming³,OUYANG Mukun²,CHEN Li²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2. Chongqing Gas Mine, Southwest Oil and Gas Field Branch of CNPC, Chongqing 400021, China
3. Exploration and Development Research Institute, PetroChina Southwest Oil and Gas Field, Chengdu, Sichuan 610213, China

Received:2021-03-10 Online:2022-04-26 Published:2022-05-07
Contact: XIAO Wenlian E-mail:1256360921@qq.com;joshxiao@163.com

摘要/Abstract

摘要：

为了认识驱替压差对不同类型储层气相渗流能力的影响,明确不同类型储层的合理开采压力,以丹风场气田须家河组主力储层Ⅱ类和Ⅲ类致密砂岩为研究对象,借助核磁共振技术开展两类储层致密岩样在不同驱替压差下的气驱水实验,分析了驱替压差对两类储层气相流动能力的影响。结果表明：驱替压差对Ⅱ类和Ⅲ类储层岩样中气相流动特征的影响程度不同。Ⅱ类储层岩样中气相流动特征主要受驱替压差的影响,驱替压差越大,气相流动能力越强,且主要影响小孔喉中的流动能力;Ⅲ类储层岩样中气相流动特征不仅受驱替压差影响,而且还受储层的孔隙结构约束,当驱替压差与储层毛管压力相接近时气相流动能力最强。因此,对于丹凤场气田不同类型致密砂岩储层,在开采时应采用最佳生产压力使气相流动处于最佳状态。

关键词: 气水两相流动, 核磁共振, 微观孔隙结构, 致密气, 须家河组

Abstract:

In order to understand the influence of displacement pressure on the gas flow capacity for different types of reservoirs and clarify the reasonable production pressures of different types of reservoirs, the tight sandstones of the main reservoir type Ⅱ and Ⅲ in the Xujiahe Formation of Danfengchang Gas Field are taken as the research object. And with the help of the NMR technology, the gas-flooding experiments of the tight rock samples of the two types of reservoirs under different displacement pressures are carried out to analyze the effect of displacement pressure on the gas flow capacity. The results show that the the pore structure and the displacement pressure difference have different effects on the gas flow characteristics of the rock samples in type Ⅱ and type Ⅲ reservoir. The gas flow characteristics of the rock samples in type Ⅱ reservoir are mainly affected by the displacement pressure difference. The greater the displacement pressure difference, the stronger the gas flow ability. And it mainly affects the flow ability in the small pore throat. While the pore structure and displacement pressure difference of type Ⅲ reservoir rock samples affect the gas flow characteristics together. When the capillary pressures of the layers are close to each other, the gas flow capacity is the best. Therefore, for tight sandstones in different types of reservoirs in Danfengchang Gas Field, the best production pressure should be used to achieve the best gas flow capacity during production.

Key words: gas-water two-phase flow, NMR（nuclear magnetic resonance）, microscopic pore structure, tight gas reservoir, Xujiahe Formation

中图分类号:

TE311

杨玉斌,肖文联,韩建,苟玲,李闽,周克明,欧阳沐鲲,陈黎. 丹凤场气田致密砂岩气水渗流特征及影响因素[J]. 油气藏评价与开发, 2022, 12(2): 356-364.

YANG Yubin,XIAO Wenlian,HAN Jian,GOU Ling,LI Min,ZHOU Keming,OUYANG Mukun,CHEN Li. Gas-water flow characteristics and influencing factors of tight sandstone in Danfengchang Gas Field[J]. Reservoir Evaluation and Development, 2022, 12(2): 356-364.

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岩样编号	岩样长度（cm）	岩样直径（cm）	渗透率（10^-3μm²）	孔隙度（%）	储层类型	参考驱替压差（MPa）	实验驱替压差（MPa）
DQ001-1-12	5.84	2.55	0.795	9.30	Ⅱ	1.30	0.70
DQ001-1-13	5.50	2.48	0.784	9.72		1.34	1.30
DQ001-1-14	5.76	2.46	0.759	8.89		1.30	2.00
DQ001-1-22	5.62	2.53	0.254	8.82	Ⅲ	2.24	1.20
DQ001-1-26	5.78	2.55	0.261	8.73		2.20	2.20
DQ001-1-27	5.68	2.53	0.259	8.71		2.20	3.10

储层类型	岩样编号	驱替压差Δp	残余水下气相相对渗透率	残余水饱和度（%）	等渗点处相对渗透率	等渗点饱和度（%）
Ⅱ类储层	DQ001-1-12	小于p_c	0.40	48.84	0.013	71.02
	DQ001-1-13	趋向于p_c	0.65	34.21	0.013	69.00
	DQ001-1-14	大于p_c	0.99	30.34	0.014	66.07
Ⅲ类储层	DQ001-1-22	小于p_c	0.13	67.35	0.008	85.00
	DQ001-1-26	趋向于p_c	0.48	40.31	0.009	70.11
	DQ001-1-27	大于p_c	0.16	47.45	0.003	74.00

储层类型	岩样编号	最小可动流体横向弛豫时间
储层类型	岩样编号	下限（ms）	上限（ms）
Ⅱ类储层	DQ001-1-12	0.28	102.00
	DQ001-1-13	0.17	105.00
	DQ001-1-14	0.10	101.00
Ⅲ类储层	DQ001-1-22	0.16	98.00
	DQ001-1-26	0.10	46.42
	DQ001-1-27	0.07	56.94

丹凤场气田致密砂岩气水渗流特征及影响因素

Gas-water flow characteristics and influencing factors of tight sandstone in Danfengchang Gas Field

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