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首页> 外文学位 >Structural modeling and volumetric reservoir estimations of the Cretaceous Derdere and Karababa reservoirs in the Cemberlitas oil field, southeastern Turkey.
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Structural modeling and volumetric reservoir estimations of the Cretaceous Derdere and Karababa reservoirs in the Cemberlitas oil field, southeastern Turkey.

机译：土耳其东南部Cemberlitas油田的白垩纪Derdere和Karababa油藏的结构模型和体积油藏估算。

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摘要

The Adiyaman region is located in the frontal belt of the southeastern Anatolia fold and thrust belt in Turkey. The region is in the northwestern continuation of the Zagros fold-thrust belt and contains several small-to-medium size oil fields. These oil fields are characterized by structural traps located in east-west trending anticlinal structures along the frontal belt. One of these oil fields is the Cemberlitas oil field which produce from fractured and dolomitized reservoirs of the Karababa and the Derdere formations of the Cretaceous Mardin group carbonates. This study focuses on delineating the structural geometry and evolution of the Cemberlitas Anticline and the reservoir characteristics in the Cemberlitas oil field based on interpretation of available 2-D seismic reflection profiles, conventional wire-line well log data, and check shot surveys. The subsurface geometry suggests that the production in the oil field is from the hanging wall anticlines within the blind leading imbricate thrust system caused by Cretaceous break-forward sequence of thrusting which involves Karababa and Derdere formations. Within the study area, there are thrust faults branching from a horizontal detachment surface in a break-forward sequence of thrusting which is suggested by decreasing dip angle of thrust faults from north to south. The subsurface geometry also demonstrates the presence of high-angle Cretaceous normal faults to the south of the leading-edge thrust of the Cretaceous contractional structures. These normal faults were most likely formed during the Cretaceous subduction due to flexural bending of the subducting slab. Three strike-slip faults are identified in the subsurface as the tear faults of the thrust system developed contemporaneously with the north--south contractional deformation in Late Cretaceous. They align parallel to the tectonic transport direction, and separate thrust sheets into different thrust blocks. Break-forward sequence of thrusting in the study area developed asymmetric hanging wall anticlines and footwall synclines and resulted in structural thickening of the Cretaceous Derdere and Karababa formations at overlapping parts of the thrust sheets. These areas present ideal production well locations due to their structural thickening and possibly fault sealing. Therefore, production possibility is higher at these overlapping thrust sheets due to increasing net pay zone thickness and volume of reservoirs. Thrust blocks which were separated from each other with tear faults caused compartmentalization of the reservoirs into productive and non-productive blocks. It is suggested here that these tear faults may be acting as lateral seals in the Cemberlitas oil field. Recoverable original oil in place in the Cemberlitas oil field was estimated into three different volumes according to porosity values obtained from well logs. Low estimate (P90) (O≥ 9%), high estimate (P10) (O≥ 4%) and best estimate (P50) (O≥ 6%) are estimated at 10,817,098 STB, 33,769,395 STB, and 19,157,391 STB respectively, while total oil remaining in the field was estimated at 5,649,127 STB.
机译：阿迪亚曼（Adiyaman）地区位于土耳其东南部安纳托利亚褶皱和逆冲带的额带。该地区位于Zagros褶皱冲断带的西北延展区，并且包含几个中小型油田。这些油田的特征是构造带位于前额带的东西向趋势背斜构造中。这些油田之一是Cemberlitas油田，其产自卡拉巴巴的裂缝和白云石化储层以及白垩纪马尔丁碳酸盐岩的德德雷地层。这项研究的重点是根据可用的二维地震反射剖面，传统的测井线测井数据和支票调查，描绘出Cemberlitas背斜的结构几何形状和演化以及Cemberlitas油田的储层特征。地下几何结构表明，油田的生产是由白垩纪冲断向前冲断序列（包括卡拉巴巴和德德雷地层）导致的盲前冲动冲断冲断系统内的悬挂壁背斜产生的。在研究区域内，有一个冲断断层从一个水平分离面以一个冲断向前的顺序分支，这可以通过从北向南减小冲断断层的倾角来表明。地下几何结构还表明，在白垩纪收缩构造前缘冲断的南部存在大角度的白垩纪正断层。这些正常断层很可能是由于俯冲板的弯曲弯曲而在白垩纪俯冲过程中形成的。在地下发现了三个走滑断层，这是与白垩纪晚期南北向收缩变形同时发展的逆冲断层。它们平行于构造传输方向对齐，并将冲断片分为不同的冲断块。在研究区内，冲断的前冲序列形成了不对称的悬挂壁背斜线和下盘倾斜线，并导致冲断层重叠部分的白垩纪Derdere和Karababa地层结构增厚。这些区域由于其结构加厚和可能的故障密封而成为理想的生产井位置。因此，由于净产层厚度和储层体积的增加，在这些重叠的逆冲薄片上的生产可能性更高。带有撕裂断层的推力块彼此分开，导致储层划分为生产性和非生产性区块。在这里建议这些撕裂断层可能是塞恩伯利塔斯油田的侧向封闭。根据从测井获得的孔隙率值，将Cemberlitas油田的可采原始油估计为三个不同的体积。低估计（P90）（O≥9％），高估计（P10）（O≥4％）和最佳估计（P50）（O≥6％）分别估计为10,817,098 STB，33,769,395 STB和19,157,391 STB估计该油田剩余的石油总量为5,649,127 STB。

著录项

  • 作者

    Tigli, Tufan.;

  • 作者单位

    The University of Alabama.;

  • 授予单位 The University of Alabama.;
  • 学科 Geology.;Petroleum geology.;Geophysics.
  • 学位 M.S.
  • 年度 2016
  • 页码 130 p.
  • 总页数 130
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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