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Stratigraphic and Structural Study of Khlesia Region Using 2D Seismic Data - North Western Iraq

Authors: Nawal A. Al-Ridha --- Nawal A. Al-Ridha
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2019 Volume: 60 Issue: 2 Pages: 277-289
Publisher: Baghdad University جامعة بغداد

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Abstract

This study deals with interpretation of stratigraphic and structural of Khlesia area north-west Iraq in Nineveh province, near the Iraq- Syria border, by using 2D seismic data. Synthetic trace are prepared by using available data of the well (Kh-1) using Geoframe program to define and picking the reflectors on seismic section. These reflectors are: (Within Fatha and Kurra Chine reflectors) representing Middle Miocene and Late Triassic ages respectively. A listric growth normal fault is affecting the stratigraphic succession, and normal fault as a result of collision of Arabian plate with Eurasian plate. In addition, minor normal faults (Dendritic and Tension) are developed on the listric normal growth fault and influenced the studied reflectors, the fault system extends (NE-SW) direction. The structural interpretation result shows two grabens (Khlesia and Tayarat) and number of structures domes. Seismic interpretation of the study area confirms the existence of some stratigraphic features which are probable to be hydrocarbon traps. Application of seismic attributes (instantaneous phase, instantaneous frequency and reflection strength section) showed low values in frequency and reflection strength, these values reflect or indicate to presence of hydrocarbon areas.


Article
Stratigraphic and Structural Study of Khlesia Region Using 2D Seismic Data - North Western Iraq

Authors: Nawal A. Al-Ridha --- Nawal A. Al-Ridha
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2019 Volume: 60 Issue: 2 Pages: 277-289
Publisher: Baghdad University جامعة بغداد

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Abstract

This study deals with interpretation of stratigraphic and structural of Khlesia area north-west Iraq in Nineveh province, near the Iraq- Syria border, by using 2D seismic data. Synthetic trace are prepared by using available data of the well (Kh-1) using Geoframe program to define and picking the reflectors on seismic section. These reflectors are: (Within Fatha and Kurra Chine reflectors) representing Middle Miocene and Late Triassic ages respectively. A listric growth normal fault is affecting the stratigraphic succession, and normal fault as a result of collision of Arabian plate with Eurasian plate. In addition, minor normal faults (Dendritic and Tension) are developed on the listric normal growth fault and influenced the studied reflectors, the fault system extends (NE-SW) direction. The structural interpretation result shows two grabens (Khlesia and Tayarat) and number of structures domes. Seismic interpretation of the study area confirms the existence of some stratigraphic features which are probable to be hydrocarbon traps. Application of seismic attributes (instantaneous phase, instantaneous frequency and reflection strength section) showed low values in frequency and reflection strength, these values reflect or indicate to presence of hydrocarbon areas.


Article
Seismic Data Processing of Subba Oil Field in South Iraq

Authors: Nawal A. Al-Ridha --- Zahraa Sh. Jassim
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2018 Volume: 59 Issue: 3B Pages: 1441-1449
Publisher: Baghdad University جامعة بغداد

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Abstract

Evaluation study was conducted for seismic interpretation using two-dimensional seismic data for Subba oil field, which is located in the southern Iraq. The Subba oil field was discovered in 1973 through the results of the seismic surveys and the digging of the first exploratory well SU-1 in 1975 to the south of the Subba oil field. The entire length of the field is 35 km and its width is about 10 km. The Subba oil field contains 15 wells most of them distributed in the central of the field. This study is dealing with the field data and how to process it for the purpose of interpretation; the processes included conversion of field data format, compensation of lost data and noise disposal, as well as the application of normal moveout correction for the purpose of improving the quality of seismic sections, using Omiga software at the processing department/ Petroleum Exploration Company. After processing RMS velocity map was done also constructed from the processing data and showed a low velocity compatibility north of the study area and an increase in velocity to the south of the oil field.

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