| 摘要: |
| 在模拟地层温度,压力条件下,试验观测塔南白垩系南屯组、铜体庙组的凝灰质砾岩、凝灰质岩屑砂岩储H的 纵、横波速度，考察岩性、矿物含最、胶结方式和接触类塑,密度、孔隙度、泥质含ffl,含水饱和度对火山碎岩声波速 度的影响。在试验考查的范闱内，发现:①致密凝灰质砾岩的卢速明显高于储油物性较好的凝灰质砾岩和凝灰质岩 ?砂岩的声速;②纵'横波速度随岩浆岩岩坻含的增加Iflj增大,随石英、长石含fi的增大而减小;③相M孔隙度条 件下,孔隙式胶结、线性接触岩石的纵,横波速度最大,基底式胶结,不接触-点接触岩石的纵、横波速度最小,纵波速 度较横波速度对胶结类型、接触方式更敏感一些;④纵.横波速度随密度增大而增大,凝灰质岩屑砂岩的声波速度与 密度存在较好的幂函数关系，纵横波速度随孔隙度、泥质含tt增大而减小.凝灰质岩屑砂岩的声速与孔隙度和泥质 含量有很好的负线性蝻数关系,但泥质(主要为凝灰质)的影响仅为孔隙度影响的1/5 ~1/10,可以忽略不计;⑤随着 含水饱和度增加,纵波速度对流体变化比横波速度更为敏感，且声速变化幅度与孔隙度存在正相关关系。 |
| 关键词: 凝灰质火山碎屑岩 声波速度 胶结类型 接触方式 岩石物理性质 |
| DOI：10.3969/j.issn.1673-5005.2012.03.011 |
| 分类号:P 584 |
| 基金项目:山东省白然科学基金项H (Y2008K08);闽家油气专项课题(2011ZX05009-003) |
|
| Petrophysical experimental research in Tanan tuffaceous pyroclastic rock reservoir |
|
HAN Xue-hui1,LI Lai-lin2,YANG Long3,ZHAO Hai-bo2,CHENG De-an2,QIU Ji-liang4
|
|
(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China ;2. Exploration and Development Research lmtitute,Daqing Oilfield Company Limited, Dating 163712, China;3. Heavy Oil Development Company of Xinjiang Oilfield，Karamay 834000，China ;4. Drilling Company No. 1，Dating Drilling and Prospecting Engineering Company，Daqing 163411，China)
|
| Abstract: |
| Under the condition of simulated formation temperature and pressure, the compression and shear wave velocity of the tuffaceous conglomerates and rock-fragment sandstones of the reservoirs in Kit, Kin group of Cretaceous system in Tanan were measured. The effects of lithology, mineral content, cementation type and particle contact mode，density, porosity, shale content, and water saturation on the aroustic velocity of the tuffaceous pyroclastic rock were studied. Within the observation limits, some rules are found :①The aroustic velocity of the fine tuffaceous conglomerates is remarkably greater than that of the tuffaceous rock-fragment sandstones with good physical property. ?The acoustic velocity increases with fragment content increasingt and decreases with quartz and feldspar content increasing.③In the same porosity, the velocity of porous cementation and lineal contact rock is the biggest, the velocity of basal cementation and raatrix-suppot-point contact rock is the smallest and the compression velocity is more sensitive to the cementation type and particle contact mode than shear wave velocity.④The acoustic velocity increases with density increasing, and the velocity of luiTaceous rock-fragment sandstones keeps a good relation with density in form of power function. The acoustic velocity decreases with porosity and shale content increasing, ihe velocity of the tuffaceous rock-fragment sandstones keeps a good relation with porosity and shale conlent in form of negative linear function, but effect of shale (be made of tuffaceous) content is only 5-10 times as small as that of the |
| Key words: iuffaceous pyrociastic rock acoustic velocity cementation type particle contact mode pelrophysical property |
