Center for Subsurface Imaging and Fluid Modeling (CSIM)

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Now showing 1 - 5 of 46
  • Dataset

    Seismic Experiment at North Arizona To Locate Washington Fault - 3D Data Interpolation

    (KAUST Research Repository, 2008-10) Hanafy, Sherif M.; Lui, Shengdong; Wang, Xin; Dai, Wei; van der Neut, Joost; Ghassal, Bandar Ismail; Wu, Qiong; Center for Subsurface Imaging and Fluid Modeling; Center for Subsurface Imaging and Fluid Modeling (CSIM); Earth Science and Engineering Program; Physical Science and Engineering (PSE) Division; The University of Utah

    The recorded data is interpolated using sinc technique to create the following two data sets

    1. Data Set # 1: Here, we interpolated only in the receiver direction to regularize the receiver interval to 1 m, however, the source locations are the same as the original data (2 and 4 m source intervals). Now the data contains 6 lines, each line has 121 receivers and a total of 240 shot gathers.

    2. Data Set # 2: Here, we used the result from the previous step, and interpolated only in the shot direction to regularize the shot interval to 1 m. Now, both shot and receivers has 1 m interval. The data contains 6 lines, each line has 121 receivers and a total of 726 shot gathers.

  • Dataset

    Gulf of Aqaba Field Trip - Datasets

    (2013-11) Hanafy, Sherif M.; Jonsson, Sigurjon; Klinger, Yann; Crustal Deformation and InSAR Group; Earth Science and Engineering Program; Physical Science and Engineering (PSE) Division

    OBJECTIVE: In this work we use geophysical methods to locate and characterize active faults in alluvial sediments. INTRODUCTION: Since only subtle material and velocity contrasts are expected across the faults, we used seismic refraction tomography and 2D resistivity imaging to locate the fault. One seismic profile and one 2D resistivity profile are collected at an alluvial fan on the Gulf of Aqaba coast in Saudi Arabia. The collected data are inverted to generate the traveltime tomogram and the electric resistivity tomogram (ERT). A low velocity anomaly is shown on the traveltime tomogram indicates the colluvial wedge associated with the fault. The location of the fault is shown on the ERT as a vertical high resistivity anomaly.

    Two data sets were collected at the study site to map the subsurface structure along a profile across the known normal fault described above. The first data set is a seismic refraction data set and the second is a 2D resistivity imaging data set.

    A total of 120 common shot gathers were collected (MatLab and DPik format). Each shot gather has 120 traces at equal shot and receiver intervals of 2.5 m. The total length of the profile is 297.5 m . Data were recorded using a 1 ms sampling interval for a total recording time of 0.3 s. A 200 lb weight drop was used as the seismic source, with 10 to 15 stacks at each shot location.

    One 2D resistivity profile is acquired at the same location and parallel to the seismic profile. The acquisition parameters of the resistivity profile are: No. of nodes: 64, Node interval: 5 m, Configuration Array: Schlumberger-Wenner, Total profile length: 315 m, Both seismic and resistivity profiles share the same starting point at the western end of the profile.

  • Dataset

    Seismic Experiment at North Arizona To Locate Washington Fault - 3D Field Test

    (KAUST Research Repository, 2008-10) Hanafy, Sherif M; Lui, Shengdong; Wang, Xin; Dai, Wei; van der Neut, Joost; Ghassal, Bandar Ismail; Wu, Qiong; Center for Subsurface Imaging and Fluid Modeling; Center for Subsurface Imaging and Fluid Modeling (CSIM); Earth Science and Engineering Program; Physical Science and Engineering (PSE) Division; The University of Utah

    No. of receivers in the inline direction: 80, Number of lines: 6, Receiver Interval: 1 m near the fault, 2 m away from the fault (Receivers 1 to 12 at 2 m intervals, receivers 12 to 51 at 1 m intervals, and receivers 51 to 80 at 2 m intervals), No. of shots in the inline direction: 40, Shot interval: 2 and 4 m (every other receiver location). Data Recording

    The data are recorded using two Bison equipment, each is 120 channels. We shot at all 240 shot locations and simultaneously recorded seismic traces at receivers 1 to 240 (using both Bisons), then we shot again at all 240 shot locations and we recorded at receivers 241 to 480.

    The data is rearranged to match the receiver order shown in Figure 3 where receiver 1 is at left-lower corner, receivers increase to 80 at right lower corner, then receiver 81 is back to left side at Y = 1.5 m, etc.

  • Dataset

    Seismic Experiment at North Arizona To Locate Washington Fault - 2D Field Test

    (KAUST Research Repository, 2008) Hanafy, Sherif M.; Lui, Shengdong; Wang, Xin; Dai, Wei; van der Neut, Joost; Ghassal, Bandar Ismail; Wu, Qiong; Center for Subsurface Imaging and Fluid Modeling; Earth Science and Engineering Program; Physical Science and Engineering (PSE) Division; The University of Utah
  • Dataset

    Qademah Fault Seismic Data Set - Northern Part

    (KAUST Research Repository, 2015-01) Hanafy, Sherif M.; Lu, Kai; Hota, Mrinal Kanti; Guo, Bowen; Tarhini, Ahmad; Center for Subsurface Imaging and Fluid Modeling; Center for Subsurface Imaging and Fluid Modeling (CSIM); Earth Science and Engineering Program; Physical Science and Engineering (PSE) Division

    Objective: Is the Qademah fault that was detected in 2010 the main fault? We collected a long 2D profile, 526 m, where the fault that was detected in 2010 is at around 300 m.

    Layout: We collected 264 CSGs, each has 264 receivers. The shot and receiver interval is 2 m. We also collected an extra 48 CSGs with offset = 528 to 622 m with shot interval = 2 m. The receivers are the same as the main survey.