苏里格气田苏59井区盒8段储层特征

苏里格气田苏59井区盒8段储层特征

摘要

苏里格气田是我国最大的致密砂岩气田，其非均质性较强。天然气的富集受控于储层质量。作者通过对该层段的储层特征包括岩石学特征，物性特征和成岩作用进行研究分析。主要得到以下认识：

（1）苏59井区盒8段的岩石类型以岩屑砂岩和岩屑石英砂岩为主，且石英的含量与岩石粒度大致成正比。各种胶结物的含量与粒度成正相关，与石英的含量成正相关。各类型的孔隙含量与粒度成正相关，与石英的含量正相关。

（2）该层段的物性较差，孔渗交会关系显示为孔隙型储层。储层的物性与岩石粒度成正相关，与石英的含量成正相关。岩石成分对物性的影响大于岩石粒度的影响。

（3）研究区建设性的成岩作用为溶蚀作用，破坏性的成岩作用为压实作用，胶结作用。岩屑石英砂岩的胶结作用和溶蚀作用强于岩屑砂岩。

（4）根据以上的结论，得出该层段的最佳储层为粗粒岩屑石英砂岩，中粒岩屑石英砂岩次之。

关键词：致密砂岩；储层特征；盒8段；苏里格气田

Reservoir Characteristics of He 8 Interval in Su 59 Wellblock , sulige gas-field Abstract: Suligegas-fieldisthebiggesttightsandstonegasfield，whose heterogeneity isstrong. In order to offer more reliable referencesto reservoirevaluation and prediction, this paper will research its reservoir characteristic. Writeruses core and casting thin sections data, with the help of microscope, porosity and permeabilitytest instrument ,X-ray diffractometer and so on, combined withthe results of previous studies ,to analyze the reservoir characteristic which include petrology features ,physical properties and diagenesis .What achievementsgottenare followings:

(1) Thetype of rock is mainly composed oflitharenite and sublitharenite dominatedin He 8 interval, Su 59 well-block, whose quantity of quartz in proportion to rock grain size roughly. The content of various kinds of cement and porosity is positively correlated with the granularity and is positively correlated withthe content of quartz.

(2) The physical properties of this layer are poor.Therelation between porosity and permeability is shown as a pore reservoir.The physical properties of the reservoir are positively correlated with the granularity of rock and are positively correlated with the content of quartz.

(3) Constructive diagenesis in study area is dissolution whereas destructive diagenesis are compaction and cementation. The cementation and dissolution of sublitharenite are stronger than litharenite.

(4) Basedon the conclusion above, the best reservoir in this layer is coarse sublithareniteand medium sublithareniteis the second.

Keywords: tight sandstone; reservoir characteristic; He 8 interval;Sulige gas-field

目录

摘要............................................................................................................................ I Abstract.. (Ⅱ)

第1章前言 (1)

1.1选题意义 (1)

1.2研究现状 (1)

1.3研究内容 (1)

1.4技术路线 (2)

1.5 取得的成果及工作量 (3)

第2章区域地质概况 (5)

2.1盆地概况 (5)

2.2研究区概况 (5)

2.3 沉积构造发育史 (6)

第3章岩石学特征 (7)

3.1岩石类型及特征 (7)

3.1.1岩石类型 (7)

3.1.2岩石粒度与成分的关系 (7)

3.2填隙物组分特征 (8)

3.2.1胶结物特征 (9)

3.2.2粒度与胶结物的关系 (9)

3.2.3成分与胶结物的关系 (10)

3.3.4杂基特征 (11)

第4章物性特征 (12)

4.1孔隙类型 (12)

4.1.1 粒度与孔隙类型的关系 (13)

4.1.2 成分与孔隙类型的关系 (13)

4.2孔渗特征 (14)