10 research outputs found
Hydrocarbon Accumulation Analysis by Reconstructing the Canyon-Fill Sequence using Seismic Stratigraphic Interpretation in the Central Gulf Coastal Plain of Texas
The Texas Gulf region has been extensively studied and explored due to its high volume of oil and gas accumulation. One of the most highly productive sequences in the region is the lower Wilcox Group, which was deposited during a gradually sea level rising. The high rate of Tertiary sedimentary source influx and repeatedly transgression and regression resulted in numerous reservoirs and ideal traps. Regression caused the development of incised canyon systems, and later the canyon was filled with marine shales during the transgression. The complex canyon-fill sequence makes petroleum accumulation possible. Both stratigraphic and structural trapping mechanisms are found in the study area. The stratigraphy of the Wilcox Group is divided based on the lithological data and electric logs. In order to investigate the lateral variations of erosional sequences and the distributions of thin-bed sand bodies, we correlate the well logging across the survey. The seismic sequences and related sandstones are identified on the seismic sections after the well-to-seismic tie. Finally, the complex canyon-fill system is rebuilt and the hydrocarbon accumulation pattern is analyzed by conducting seismic stratigraphic interpretation in the study area
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Reading Alex E. Chávez's Sounds of Crossing: Music, Migration, and the Aural Poetics of Huapango Arribeño (Duke University Press, 2017), a Pedagogical Lesson
In this article we argue for a slow, methodical, and collaborative approach to difficult texts. This article is the story of how, thanks to the efforts of the students and professor, a book that rewards diligent effort, and some creative pedagogical strategies borne of desperation, the experience of reading Alex E. Chávez’s Sounds of Crossing became a highlight of our college experience. In this article we explore the differing perspectives of students and faculty, including the reasons students came to view this as a meaningful experience. Some of our significant findings include the following: 1) the reading of the book was meaningful even though it was difficult; 2) the meaningfulness of the reading was not diminished by how difficult the theoretical and musical material remained, even with close exegesis; 3) the difficulty was eased by specific pedagogical methods, mainly based on collaborative learning, that were found by the students to be effective for increasing comprehension and navigation of the text; and 4) the connection between the book and the students’ lived experience enhanced the appeal of the text, their willingness to continue with it in spite of difficulty, their tolerance for confusion, and their overall satisfaction with the experience of reading it
Recommended from our members
Reading Alex E. Chávez's Sounds of Crossing: Music, Migration, and the Aural Poetics of Huapango Arribeño (Duke University Press, 2017), a Pedagogical Lesson
In this article we argue for a slow, methodical, and collaborative approach to difficult texts. This article is the story of how, thanks to the efforts of the students and professor, a book that rewards diligent effort, and some creative pedagogical strategies borne of desperation, the experience of reading Alex E. Chávez’s Sounds of Crossing became a highlight of our college experience. In this article we explore the differing perspectives of students and faculty, including the reasons students came to view this as a meaningful experience. Some of our significant findings include the following: 1) the reading of the book was meaningful even though it was difficult; 2) the meaningfulness of the reading was not diminished by how difficult the theoretical and musical material remained, even with close exegesis; 3) the difficulty was eased by specific pedagogical methods, mainly based on collaborative learning, that were found by the students to be effective for increasing comprehension and navigation of the text; and 4) the connection between the book and the students’ lived experience enhanced the appeal of the text, their willingness to continue with it in spite of difficulty, their tolerance for confusion, and their overall satisfaction with the experience of reading it
Pre-Stack Simultaneous Inversion for Petrophysical Properties of the Lower Wilcox Erosional Remnant Sandstone Along the Texas Gulf Coastal Plain
The lower Wilcox sand deposits encased between two continuous erosional sequences are of good reservoir quality and usually gas productive. However, the distribution of sedimentation is laterally scattered and hard to interpret in seismic data. Simultaneous inversion of petrophysical parameters such as P-impedance, S-impedance, and density by the integration of pre-stack data and well logs allows us to quantitatively characterize the reservoirs, and to distinguish them from the surrounding rocks. In this study, we use pre-stack inversion of the petrophysical parameters for the gas reservoir in an analog field. For wells that are missing sonic and density logs, we estimate the parameters using the time average equation and Gardner\u27s equation, respectively. The estimation results are verified using well log correlations. Rock physics analyses are conducted to find the optimal parameters to characterize the producing sand. Our inversion results show a successful delineation of the reservoir using the Vp/Vs value. In addition, the sandstone is mapped in the crossplot of the inverted results