新疆石油地质

新疆石油地质 ›› 2021, Vol. 42 ›› Issue (1): 38-45.doi: 10.7657/XJPG20210105

• 油气勘探 • 上一篇    下一篇

准噶尔盆地阜东斜坡韭菜园子组储集层特征及敏感性

王剑1,2,3a, 马聪1,2,3a, 罗正江1,2,3a, 吕剑3b, 李二庭1,2,3a, 张宝真3c, 刘翠敏1,2,3a   

  1. 1. 中国石油 砾岩油气藏勘探开发重点实验室，新疆 克拉玛依 834000
    2. 新疆维吾尔自治区砾岩油藏重点实验室，新疆 克拉玛依 834000
    3. 中国石油 新疆油田分公司 a.实验检测研究院；b.开发公司；c.风城油田作业区，新疆 克拉玛依 834000
  • 收稿日期:2020-05-12 修回日期:2020-07-29 出版日期:2021-02-01 发布日期:2021-02-24
  • 作者简介:王剑（1984-）,男,湖北当阳人,工程师,沉积储层,（Tel）0990-6868691（E-mail） wangjian_2605@126.com
  • 基金资助:
    国家科技重大专项(2017ZX05008);中国石油科技重大专项(2017E-0401)

Characteristics and Reservoir Sensitivity of Jiucaiyuanzi Formation in Fudong Slope, Junggar Basin

WANG Jian1,2,3a, MA Cong1,2,3a, LUO Zhengjiang1,2,3a, LYU Jian3b, LI Erting1,2,3a, ZHANG Baozhen3c, LIU Cuimin1,2,3a   

  1. 1. 1.Key Laboratory for Exploration and Development of Conglomerate Reservoir, PetroChina, Karamay, Xinjiang 834000, China
    2. Xinjiang Key Laboratory for Conglomerate Reservoir, Karamay, Xinjiang 834000, China
    3. PetroChina Xinjiang Oilfield Company, a.Reaearch Institute of Experiment and Detection; b.Development Company; c.Fengcheng Oilfield Operation District, Karamay, Xinjiang 834000, China
  • Received:2020-05-12 Revised:2020-07-29 Online:2021-02-01 Published:2021-02-24

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摘要：

为确定准噶尔盆地阜东斜坡下三叠统韭菜园子组储集层敏感性特征及敏感程度，及时调整压裂工艺及注采开发措施，在剖析储集层岩性、储集空间、孔隙结构、物性等特征的基础上，结合扫描电镜、X射线衍射全岩矿物组成等分析资料，系统评价了研究区韭菜园子组砂砾岩储集层敏感性及其影响因素。研究表明，阜东斜坡韭菜园子组储集层的酸敏性最强，盐敏性为中等偏强，水敏性和速敏性整体上属于中等偏弱。黏土矿物的发育部位和产状，是决定储集层敏感性程度的关键因素。粒间充填的丝状、絮状伊蒙混层是产生水敏的主要原因，同时，水敏性和速敏性还受丝带状伊利石的影响；盐敏的形成则源于蠕虫状高岭石；而研究区储集层填隙物中富含沸石、方解石胶结物及栉壳状和叶片状绿泥石，则是导致强酸敏的主要原因。引入静态浸泡实验，建立动静态一体敏感性评价方法，有效解决了因胶结疏松、膨胀性强及岩性致密难以获取敏感性评价参数的问题，能够更加直观地反映储集层敏感性机理，为同类储集层敏感性评价提供了新的思路。

关键词: 准噶尔盆地, 阜东斜坡, 韭菜园子组, 储集层特征, 敏感性, 微观特征, 黏土矿物, 流动性实验, 静态浸泡实验

Abstract:

In order to investigate the characteristics and degree of reservoir sensitivity of the lower Triassic Jiucaiyuanzi formation in the Fudong slope of Junggar basin, the fracturing technology and injection-production development measures have been timely updated. The sensitivity of the conglomerate reservoirs in the Jiucaiyuanzi formation and its controlling factors on the sensitivity were systematically evaluated based on the analysis of reservoir lithology, reservoir space, pore structure and physical properties, and the data of SEM and whole-rock X-ray diffraction in the study area. The studies show that acid sensitivity of the reservoir is the strongest, followed by medium-strong salinity sensitivity, and the last are water sensitivity and velocity sensitivity, generally medium to weak. The location and occurrence of clay minerals are key factors that determine the reservoir sensitivity. Filamentous and flocculent illite/smectite formation among grains is the primary cause for water sensitivity. Meanwhile, water sensitivity and velocity sensitivity are also affected by filamentous illite. The salinity sensitivity is mainly caused by worm-like kaolinite. Furthermore, interstitial fillings rich in zeolite, calcite cements and comb-shaped and leaf-shaped chlorite are the main reasons resulting in the strong acid sensitivity in the study area. The integrated sensitivity evaluation method of dynamic flow and static immersion established through static immersion comparative experiments is introduced, which can eliminate the difficulty in obtaining sensitivity evaluating parameters due to loose cementation, strong expansion and dense lithology. This method can reflect the sensitivity mechanism of the reservoir more intuitively, and provides a new way for sensitivity evaluation of similar reservoirs.

Key words: Junggar basin, Fudong slope, Jiucaiyuanzi formation, reservoir characteristic, sensitivity, microscopic characteristic, clay mineral, fluidity test, static immersion experiment

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