Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)

Danping Cao and Wenyuan Liao

Search and Discovery.com

... in Geophysics. The efficiency and accuracy of FWI are determined by the three main components: numerical solution for forward problem, gradient...

Stress-Dependent Permeability and Dynamic Elastic Moduli of Reservoir and Seal Shale

Daisuke Katsuki, Anton Padin Deben, Olawale Adekunle, Andrew J. Rixon, Azra N. Tutuncu

Unconventional Resources Technology Conference (URTEC)

... bits in the horizontal direction (parallel to the bedding). Dry air was used as coolant while plugging to avoid unnecessary chemical disturbance...

Reducing parameter coupling effect for subsoil density estimation using 3D seismic full-waveform inversion with horizontal-force source

Y. Kawasaki, S. Minato, R. Ghose

International Meeting for Applied Geoscience and Energy (IMAGE)

...Reducing parameter coupling effect for subsoil density estimation using 3D seismic full-waveform inversion with horizontal-force source Y. Kawasaki...

Turbulence Modulation in Clay-Rich Sediment-Laden Flows and Some Implications for Sediment Deposition

Jaco H. Baas, James L. Best

Journal of Sedimentary Research (SEPM)

... velocity gradient (Fig. 2 B) and (2) an upper zone (z/h > 0.25) where the velocity is nearly invariant with depth, i.e., a region of "plug flow" above...

Elastic full-waveform inversion using random space shift

Yuhui Yao, Jizhong Yang, Yuzhu Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... from −2.0 to 2.0 𝜆J in the gradient of P-wave velocity. While in the gradient of S-wave velocity, it is performed with random horizontal space shift...

Identification and calculation of transfer overpressure in the northern Qaidam Basin, northwest China

Changyu Fan, Zhenliang Wang, Aiguo Wang, Suotang Fu, Liqun Wang, Yongshu Zhang, Hongxi Kong, and Xiao Zhang

AAPG Bulletin

... 6. With the pore-pressure gradient increasing, responses of different overpressure generation mechanisms on a sonic velocity–density crossplot...

Physical Processes in the Ocean: Part 2: Relation of Oceanography to Sedimentation: PART 1

R. H. Fleming, Roger Revelle

AAPG Special Volumes

... °C. per kilometer. End_Page 53------------------------- That is, the vertical gradient is about 6000 times as great as the horizontal gradient...

Hydraulic Factors Controlling the Shape of Laminae in Laboratory Deltas

Alan V. Jopling

Journal of Sedimentary Research (SEPM)

... type, flow discharge, rate of sediment transport, velocity, stream depth, basin depth, slope of the energy gradient, bed tractive stress, water...

Determining a Good Hole Cleaning by Judging the Cutting Transport Parameter in 81/2" Horizontal Hole Section Leads to Operational Success During Underbalanced Drilling Operation

Raden Hanggara Tri Poetra, Kitos G. Akbar, Hasnan Rifani, Robani Sadiya

Indonesian Petroleum Association

... ½ inch horizontal UBD operation. We investigated the influence or the effect the variety of hole size, Bottom Hole assembly (BHA) tool size, cutting size...

Enhancing PSDM via Well Data Derived from Gradient Boosted Trees Machine Learning

Marianne Rauch, Mike Perz, Sathiya Namasivayam, Ritesh Sharma

Unconventional Resources Technology Conference (URTEC)

...Enhancing PSDM via Well Data Derived from Gradient Boosted Trees Machine Learning Marianne Rauch, Mike Perz, Sathiya Namasivayam, Ritesh Sharma URTeC...

Fluid Flow

Gerard Middleton, John B. Southard

Special Publications of SEPM

... and normal-to-boundary component y of instantaneous fluid velocity in turbulent flow past a solid boundary. The horizontal line representing the mean...

Pre-Stack Calibration to Well Data: Intercept & Gradient Scaling … A Case Study From the Norwegian North Sea

Nguyen Nam, Larry Fink

Indonesian Petroleum Association

.... The effect of applying a gradient scalar is to stretch or squeeze the dataset vertically. Combining both scalars, it appears that the scale of the real...

Time Depth Conversion of a Prospect With Near-Surface Velocity Anomalies Using Stacking Velocites and PSDM Velocities: A Comparison

Tan Boon Hua, Lothar Schulte

Indonesian Petroleum Association

... effect of the seismic interpretation. Therefore it is necessary to capture the velocity anomalies as accurately as possible for the time depth...

Some Relations Among Sedimentation, Stratigraphy, and Seismic Exploration

W. C. Krumbein

AAPG Bulletin

... OF SEISMIC VELOCITY WITH DEPTH Weatherby and Faust (1935) furnish data on the effect of depth of overburden on seismic velocity. A Pennsylvanian section...

Relating Seismic Time to Geological Datum: ABSTRACT

James L. Porter

AAPG Bulletin

... are introduced. Three types of errors are inherent in correcting seismic time to a horizontal datum. These are: (1) if velocity is inaccurate, each change...

Elastic and Absorption Properties of Rocks and Their Use in Direct Exploration for Oil and Gas

T. Z. Verbitskiy

Petroleum Geology: A Digest of Russian Literature

..., this decrease is 6-46%. With further increase in gas saturation of the rock, the velocity of the longitudinal waves increases with a gradient...

Quantification of Dynamic Sand Settling Velocity in High-Viscosity Friction Reducers and Correlation with Rheology

Y. Thomas Hu, Chris Popeney, Chad Gilmer, Pious Kurian

Unconventional Resources Technology Conference (URTEC)

... In order to predict sand transport in the fracture, the velocity of sand settling under horizontal shear flow (dynamics settling) was quantified...

ABSTRACT Geopressure Impact on Seismic Interpretations: Case Histories from the Gulf of Mexico , #90104 (2010)

Shaker Selim S.

Search and Discovery.com

... of subsurface geopressure on seismic velocity is significant, but not well documented. Understanding how this effect influences seismic  attributes...

Geothermal Exploration from Deep-Well Data

William F. Tanner

GCAGS Transactions

... temperatures were used as the basis for several kinds of maps: geothermal gradient, temperature at 1,000 m, temperature at 2,000 m, and depth to 100...

Multiphase Flow Simulation of Horizontal Well Artificial Lift and Life-of-Well Case Histories: HEAL System Modeled in PipeFractionalFlow

Anand Nagoo, Jeff Saponja, Trystan Wall, Kevin Eike, Mukul Sharma

Unconventional Resources Technology Conference (URTEC)

... and 5, the simulator results show in a simple, clear and unambiguous way the effect of horizontal wellbore inclination in its ability to reliably...

AAPG Memoir 76, Chapter 15: Forward Modeling of Log Response in Geopressured Formations Reveals Valuable Insights to the Various Pore-Pressure Prediction Techniques

J. C. Rasmus

AAPG Special Volumes

... pressure estimation from velocity data: accounting for overpressure mechanisms besides undercompaction: International Association of Drilling...

Abstract: Determining the Structure of Basalt Flows with Wide-Angle Seismic Data, by M. M. Fliedner, R. S. White, and J. Fruehn; #90923 (1999)

Search and Discovery.com

Seismic Modeling and Expression of Common Fold-Thrust Belt Structures; #42266 (2018)

Jianjun Li, Shankar Mitra

Search and Discovery.com

... because the horizontal velocity differences within the fold. Below the frontlimb, there is a stair case pull up effect because of the lateral increasing...

Rock Physics Study of Coal Bed Methane Reservoir Rock: Case Study of Muaraenim Coal

Bagus Endar B. Nurhandoko, Susilowati, Usep M. Ishaq, Hussein Rudiyanto, Y. Wiyanto, Budi Sulistyanto, Mahatman L. Budi, Kaswandhi Triyoso, KiskoRiondo Siahaan, Wahyu E. Abdillah, Danang Kusudiharjo

Indonesian Petroleum Association

... saturation, the anisotropy is clearly identified;the velocity of VTI (horizontal cleat) is generally low, but in high overburden pressure (more than 30 Bar...

The Fabric, or Internal Structure, of Rocks … The Patterns of Anisotropy; #42188 (2018)

Heloise B. Lynn

Search and Discovery.com

... to the bedding plane, the P wave velocity will be slower. Figure 2 presents schematically the symmetry terms. Transverse isotropy with a horizontal axis, HTI...