Based on the comprehensive use of logging, pressure measurement, testing and other data, the abnormal pressure was identified, the pressure distribution characteristics and mudstone compaction mode were studied, and the causes of overpressure were analyzed. The results show that there is overpressure in the deep area of the study area, and the plane gradually changes from the north to the central area to overpressure, the pressure coefficient in the main depression area is 1.0 - 1.6, and the pressure coefficient in the eastern area is 1.0 - 1.2; the mudstone index compaction mode is the most common compaction mode, the mudstone in the eastern part of the study area is the common exponential compaction mode, the mudstone in the main depression area is different from the common exponential compaction mode, showing two-stage characteristics, which is a linear two-stage compaction mode; the eastern and main depression areas of the study area are fluid expansion/Pressure conduction causes overpressure.
Cite this paper
Shi, Z. (2023). Distribution and Genesis Analysis of Overpressure in X Area of Pearl River Estuary Basin. Open Access Library Journal, 10, e9861. doi: http://dx.doi.org/10.4236/oalib.1109861.
Wang, J.H., Liu, L.H., Chen, S.H. and Shang, Y.L. (2011) Tectonic-Sedimentary Response and Regional Tectonic Significance of the Second Act of the Zhuqiong Movement in the Enping Depression of the Pearl River Estuary Basin. Acta Petrolei Sinica, 32, 588-595.
Hunt, J.M., Whelan, J.K., Eglinton, L.B., et al. (1998) Relation of Shale Porosities, Gas Generation, and Compaction to Deep Overpressures in the U.S. Gulf Coast. In: Law, B.E., Ulmishek, G.F. and Slavin, V.I., Eds. Abnormal Pressures in Hydrocarbon Environments. AAPG, Tulsa, 87-104.
https://doi.org/10.1306/M70615C5
Fertl, W.H. and Timko, D.H. (1972) How Down Hole Temperature, Pressure Affect Drilling, Part 3: Overpressure Detection from Wireline Methods. World Oil, 8, 36-66.
Hermanrud, C., Wensass, L., Teige, G.M.G., et al. (1998) Shale Porosities from Well Logs on Haltenbanken (Offshore Mid-Norway) Show no Influence of Overpressuring. In Law, B.E., Ulmishek, G.F. and Slaving, V.I., Eds., Abnormal pressures in Hydrocarbon Environments. AAPG, Tulsa, 65-85.
https://doi.org/10.1306/M70615C4
Li, J., Tang, Y., Wu, T., Zhao, J.Z., Wu, H.Y., et al. (2020) Genesis of Overpressure and Hydrocarbon Accumulation Effect in Large Oil Area of Conglomerate Conglomerate in Mahu Sag in Junggar Basin. Petroleum Exploration and Development, 47, 679-690.
