延川南深部煤层气勘探开发面临的挑战和对策

doi:10.13809/j.cnki.cn32-1825/te.2020.04.001

Abstract

Abstract:

Deep CBM resources with great potential is an important area of CBM exploration and development in China. After more than 10 years of research and exploration, Sinopec East China Oil & Gas Company has made positive progress in basic geological theory research and low-cost engineering technology research of deep CBM. The first deep coalbed methane field in South Yanchuan put into commercial development in China has been built, the geological theory of "five factors" for coordinated control of deep CBM enrichment and high production has been established, a refined drainage system for deep CBM has been formulated, the low-cost engineering technology of deep CBM has been integrated, many low-cost exploration and development technologies of deep CBM dynamic evaluation and zonal management have been established, the development technology strategy of deep coalbed methane has been basically formed, and an economical and effective mode of exploration and development has been explored. All these above contribute to the realization of the benefit development for deep CBM. However, the exploration and development of deep CBM in China is still in its infancy and exploration stage. In the practice of exploration and development, there are still many challenges, such as theoretical innovation, technological breakthrough, and benefit development. Specifically, ①Deep CBM has strong geological heterogeneity, and the development engineering technology is not fully suitable for the change of unique geological characteristics; ②Some gas wells have short stable production period, rapid decline, and long-term low production effective production; ③The vertical resources need to be further evaluated, and the gas field reserves are not fully utilized. In order to solve the above problems, three countermeasures are put forward: ①innovating and applying the effective scale fracturing technology research under the geological conditions of high stress and low permeability of deep coal seam to achieve the increase of production, cost reduction and efficiency; ②deepening the analysis of the main causes of low efficiency, and taking the removal of blocking and dredging as the direction of governance; ③strengthening the potential evaluation of deep CBM resources and the development technology of applicability so as to improve the development of reserves and maintain the vitality of the gas field.

Key words: Yanchuannan field, deep CBM, exploration and development, productivity construction, development strategy

CLC Number:

TE37

WU Yuyuan,CHEN Zhenlong. Challenges and countermeasures for exploration and development of deep CBM of South Yanchuan[J].Reservoir Evaluation and Development, 2020, 10(4): 1-11.

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References 12

[1]	龙胜祥, 李辛子, 叶丽琴 , 等. 国内外煤层气地质对比及其启示[J]. 石油与天然气地质, 2014,35(5):696-703. doi: 10.11743/ogg20140515
	LONG S X, LI X Z, YE L Q , et al. Comparison and enlightenment of coalbed methane geology at home and abroad[J]. Oil & Gas Geology, 2014,35(5):696-703. doi: 10.11743/ogg20140515
[2]	贾承造, 郑民, 张永峰 . 中国非常规油气资源与勘探开发前景[J]. 石油勘探与开发, 2012,39(2):129-136.
	JIA C Z, ZHENG M, ZHANG Y F . Unconventional hydrocarbon resources in China and the prospect of exploration and development[J]. Petroleum Exploration and Development, 2012,39(2):129-136.
[3]	中共中央文献研究室. 习近平关于社会主义生态文明建设论述摘编[M]. 北京: 中央文献出版社, 2017.
	Party Literature Research Center of CPCCC. XI Jinping’s excerpts on the construction of socialist ecological civilization[M]. Beijing: Central Party Literature Press, 2017.
[4]	陈贞龙, 郭涛, 李鑫 , 等. 延川南煤层气田深部煤层气成藏规律与开发技术[J]. 煤炭科学技术, 2019,47(9):112-118.
	CHEN Z L, GUO T, LI X , et al. Enrichment law and development technology of deep coalbed methane in South Yanchuan Coalbed Methane Field[J]. Coal Science and Technology, 2019,47(9):112-118.
[5]	陈贞龙, 王烽, 陈刚 , 等. 延川南深部煤层气富集规律及开发特征研究[J]. 煤炭科学技术, 2018,46(6):80-84.
	CHEN Z L, WANG F, CHEN G , et al. Study on the enrichment law and development characteristics of deep coal bed methane in southern Yanchuan[J]. Coal science and technology, 2018,46(6):80-84.
[6]	穆福元 . 中国煤层气产业进展与思考[M]. 北京: 石油工业出版社, 2017.
	MU F Y. CBM industry progress in China[M]. Beijing: Petroleum Industry Press, 2017.
[7]	曹艳, 龙胜祥, 李辛子 , 等. 国内外煤层气开发状况对比研究的启示[J]. 新疆石油地质, 2014,35(1):109-113.
	CAO Y, LONG S X, LI X Z , et al. The enlightenment from comparative studies of the coalbed methane(CBM) development at home and abroad[J]. Xinjiang Petroleum Geology, 2014,35(1):109-113.
[8]	王勃, 姚红星, 王红娜 , 等. 沁水盆地成庄区块煤层气成藏优势及富集高产主控地质因素[J]. 石油与天然气地质, 2018,39(2):366-372.
	WANG B, YAO H X, WANG H N , et al. Favorable and major geological controlling factors for coalbed methane accumulation and high production in the Chengzhuang Block, Qinshui Baisn[J]. Oil & Gas Geology, 2018,39(2):366-372.
[9]	冯立杰, 贾依帛, 岳俊举 , 等. 煤层气开采关键地质影响因素[J]. 石油与天然气地质, 2017,38(6):1105-1112.
	FENG L J, JIA Y B, YUE J J , et al. Key geological factors influencing coal bed methane exploitation[J]. Oil & Gas Geology, 2017,38(6):1105-1112.
[10]	陈刚, 胡宗全 . 鄂尔多斯盆地东南缘延川南深层煤层气富集高产模式探讨[J]. 煤炭学报, 2018,43(6):1572-1579.
	CHEN G, HU Z Q . Discussion on the model of enrichment and high yield of deep coalbed methane in Yanchuannan area at Southeastern Ordos Basin[J]. Journal of China Coal Society, 2018,43(6):1572-1579.
[11]	方志雄 . 延川南煤层气田勘探开发关键技术及应用[M]. 北京: 地质出版社, 2017.
	FANG Z X. Key technology and application of exploration and development of coal bed gas field in Yanchuannan [M]. Beijing: Geological Publishing House, 2017.
[12]	王镜惠, 王美冬, 田锋 , 等. 高煤阶煤层气储层产气能力定量评价[J]. 油气地质与采收率, 2019,26(4):105-110.
	WANG J H, WANG M D, TIAN F , et al. Quantitativeevaluationofproductioncapacityofhighrankcoalbedmethanereservoir[J]. Petroleum Geology and Recovery Efficiency, 2019,26(4):105-110.

区块	埋深/ m	厚度 /m	孔隙度/ %	渗透率/10^-3μm²	镜质组含量/ %	灰分含量/ %	热演化程度/ %	含气量/ （m³·t^-1）	矿化度/ （g·L^-1）	地层压力系数
谭坪	800~1 000	2.8~6.9	4.2~6.7	0.01~0.6	67.6~80.8	8~36	1.9~2.4	8~12	3~80	0.4~0.6
万宝山	1 000~1 600	3.5~6.0	3.0~5.3	0.2~0.8	70.2~89.2	5.4~22	2.1~3.2	10~22	2~7	0.5~0.8

类型	物质基础		保存条件				可采条件
类型	含气量 /(m³·t^-1)	厚度/m	压力系数	构造条件	水文条件	顶底板条件	地应力/（MPa·m^-1）	煤体结构	渗透率/10^-3μm²
I类	>12	>5	>0.8	简单	承压区	泥岩	<0.015	原生—碎裂	>0.1
II类	8~12	3~5	0.6~0.8	较简单	弱径流	致密砂岩	0.015~0.025	碎粒结构	0.01~0.1
III类	<8	<3	<0.6	复杂	补给—强径流区	砂岩灰岩	>0.025	糜棱结构	<0.01

分区		静态地质			压裂施工		开发动态			主控因素
分区		构造	含气量/ （m³·t^-1）	渗透率/ 10^-3μm²	施工曲线	停泵压力/ MPa	稳产气量/ （m³·d^-1）	产液/ （m³·d^-1）	矿化度/（mg·L^-1）	主控因素
万宝山	南区	微背斜	14~20	0.2~0.8	平稳	20~30	1 500~1 600	0.45	50 000~80 000	高渗保存好
	北区	小断层	14~19	0.1~0.4	平稳	20~30	1 000~1 200	0.43	10 000~36 000	中渗保存中等
	东区	近大断裂	8~12	0.1~0.3	压力变化大	>30,<20	580	1.5	2 000~5 000	高渗保存差
	西区	无断层	12~19	<0.1	压力高、砂堵	>30	670	<0.3	>80 000	低渗保存好
	断裂带	近小断层	6~16	0.1~0.6	陡降、压力低	<15	0~230	>8	<2 000	大液量
谭坪	主体区	小断层	10~12	0.2~0.8	平稳	10~20	1 000	0.8	3 000~5 000	高渗保存中等

Challenges and countermeasures for exploration and development of deep CBM of South Yanchuan

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