志丹油田纸坊北油区三叠系延长组长6-长9储层致密史与油藏成藏史研究

刘玲; 张创; 孙明

doi:10.13686/j.cnki.dzyzy.2023.03.009

志丹油田纸坊北油区三叠系延长组长6-长9储层致密史与油藏成藏史研究

刘玲^1,,
张创²,
孙明²

1.
延长油田股份有限公司勘探开发技术研究中心, 陕西延安 716000

2.
延长油田股份有限公司志丹采油厂, 陕西延安 717500

基金项目:
中国博士后科学基金资助项目"永宁油田纸坊北-顺宁油区三叠系延长组综合地质研究"（2019M653891XB）

详细信息

作者简介: 刘玲(1985—), 女, 硕士, 高级工程师, 从事油气田开发地质研究, 通信地址陕西省延安市宝塔区延长油田股份有限公司崖里坪基地, E-mail// workshop84@126.com

中图分类号: P618.13

收稿日期: 2021-09-13

修回日期: 2022-04-18

刊出日期: 2023-06-25

COMPACTING AND ACCUMULATION HISTORY OF CHANG 6-CHANG 9 RESERVOIRS FROM THE TRIASSIC YANCHANG FORMATION IN ZHIDAN OILFIELD

LIU Ling^1,,
ZHANG Chuang²,
SUN Ming²

1.
Exploration and Development Research Center of Yanchang Oilfield Co., Ltd., Yan'an 716000, Shaanxi Province, China

2.
Zhidan Oil Production Plant of Yanchang Oilfield Co., Ltd., Yan'an 717500, Shaanxi Province, China

Received Date: 13 September 2021

Revised Date: 18 April 2022

Publish Date: 25 June 2023

摘要

摘要:
通过对志丹油田纸坊北地区长6-长9不同层段储层研究，恢复砂岩储层成岩致密化过程，建立各个层位砂岩孔隙演化规律.依据流体包裹体均一温度、荧光光谱测试分析，确定了研究区长6-长9油层组石油充注期次和时间，查明了该区油藏的成藏史.对成岩-致密-成藏的耦合关系分析结果揭示，研究区长6-长9油藏为"先致密、后成藏"的成岩-成藏特征，为下一步成藏主控因素确定及有利区预测提供理论依据.
- 流体包裹体 /
- 致密史 /
- 成藏史 /
- 延长组 /
- 储层 /
- 志丹油田
Abstract:
The diagenetic densification process of sandstone reservoir is restored and pore evolution law of sandstone in each horizon is established through the study of Chang 6-Chang 9 reservoirs in North Zhifang area of Zhidan Oilfield. The oil charging period and time of Chang 6-Chang 9 oil groups, as well as the accumulation history of oil reservoir in the area, are determined on the basis of analysis on homogenization temperature of fluid inclusions and fluorescence spectrum test. The analysis of coupling relationship between diagenesis-densification-accumulation reveals that the Chang 6-Chang 9 reservoirs are characterized by densification before the hydrocarbon accumulation, which provides a theoretical basis for determination of the main controlling factors of accumulation and prediction of favorable areas in the future.
- fluid inclusion /
- compacting history /
- accumulation history /
- Yanchang Formation /
- reservoir /
- Zhidan Oilfield

HTML全文

图 1 志丹油田纸坊北油区长9砂体顶面构造与砂厚及试油产量叠合图

Figure 1.

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图 2 纸坊北地区胶结减孔率和压实减孔率交汇图

Figure 2.

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图 3 纸坊北地区长6—长9油层组烃类包裹体荧光光谱特征

Figure 3.

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图 4 纸坊北地区烃类包裹体荧光光谱主峰波长与红绿商交汇图

Figure 4.

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图 5 纸坊北地区烃类包裹体荧光光谱主峰波长与光谱参数QF535交汇图

Figure 5.

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图 6 纸坊北地区长6—长9油层组不同产状内烃类包裹体伴生盐水包裹体均一温度直方图

Figure 6.

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图 7 志丹油田纸坊北地区长6—长9油藏成岩－成藏耦合关系图

Figure 7.

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表 1 纸坊北地区延长组储层分选系数及原始孔隙度恢复计算结果

Table 1. Reservoir sorting coefficient and primary porosity recovery of Yanchang Formation in North Zhifang area

层位	Trask分选系数			Φ/%
层位	最小	最大	平均	最小	最大	平均
长6	1.2	1.7	1.6	34.5	40.9	35.6
长7	1.5	1.8	1.6	34.0	36.7	35.4
长8	1.5	1.7	1.6	34.8	36.3	35.6
长9	1.5	1.7	1.6	34.4	35.9	35.2

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表 2 纸坊北地区不同层位压实作用和胶结作用对孔隙度的影响对比

Table 2. Effects of compaction and cementation on porosity at different horizons in North Zhifang area

层位	压实减孔率/%	胶结减孔率/%
长6	49.80	31.65
长7	54.63	31.49
长8	58.84	29.52
长9	61.64	26.87

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表 3 纸坊北地区各层位溶蚀作用对孔隙度的影响对比

Table 3. Comparison of the effect of dissolution on porosity at different horizons in North Zhifang area

层位	溶蚀增孔量/%	溶蚀增孔率/%
长6	3.47	9.76
长7	2.70	7.62
长8	2.44	6.86
长9	3.80	10.78

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表 4 纸坊北地区长6—长9油层组孔隙度变化及计算、实测值

Table 4. Porosity variation, calculated and measured values of Chang 6－Chang 9 oil reservoirs in North Zhifang area

层位		长6储层	长7储层	长8储层	长9储层
早成岩期	绿泥石充填作用	-5.5	-6.0	-2.6	-3.0
	机械压实作用	-49.8	-54.6	-58.8	-61.6
	硅质胶结作用	-2.4	-3.5	-2.5	-0.9
中成岩期	伊利石充填作用	-6.2	-5.5	-2.3	-3.7
	碳酸盐岩胶结作用	-16.7	-15.2	-22.2	-18.7
	沥青质沉积作用	-0.9	-1.4	-0.01	-0.5
	溶蚀作用	+9.8	+7.6	+6.7	+10.8
裂缝影响		+0.4	+0.01	+0.4	+0.3
现今计算		10.2	7.6	6.7	8.0
现今实测		6~14 （10.1）	4~12 （7.4）	4~10 （6.8）	2~12 （7.6）
单位：%. +为增加，－为减少，括号内为平均值.

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志丹油田纸坊北油区三叠系延长组长6-长9储层致密史与油藏成藏史研究

1. 延长油田股份有限公司 勘探开发技术研究中心, 陕西 延安 716000 2. 延长油田股份有限公司 志丹采油厂, 陕西 延安 717500

作者简介: 刘玲(1985—), 女, 硕士, 高级工程师, 从事油气田开发地质研究, 通信地址 陕西省延安市宝塔区延长油田股份有限公司崖里坪基地, E-mail// workshop84@126.com

COMPACTING AND ACCUMULATION HISTORY OF CHANG 6-CHANG 9 RESERVOIRS FROM THE TRIASSIC YANCHANG FORMATION IN ZHIDAN OILFIELD

1. Exploration and Development Research Center of Yanchang Oilfield Co., Ltd., Yan'an 716000, Shaanxi Province, China 2. Zhidan Oil Production Plant of Yanchang Oilfield Co., Ltd., Yan'an 717500, Shaanxi Province, China

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1.
延长油田股份有限公司勘探开发技术研究中心, 陕西延安 716000

2.
延长油田股份有限公司志丹采油厂, 陕西延安 717500

作者简介: 刘玲(1985—), 女, 硕士, 高级工程师, 从事油气田开发地质研究, 通信地址陕西省延安市宝塔区延长油田股份有限公司崖里坪基地, E-mail// workshop84@126.com

1.
Exploration and Development Research Center of Yanchang Oilfield Co., Ltd., Yan'an 716000, Shaanxi Province, China

2.
Zhidan Oil Production Plant of Yanchang Oilfield Co., Ltd., Yan'an 717500, Shaanxi Province, China