Petrophysical and geomechanical properties of rocks from the oilfields of the Krishna-Godavari and Cauvery Basins, India

Abstract

The petrophysical and mechanical properties of reservoir rocks from two major basins on the east coast of India were studied using samples cored from 19 wells in the Krishna-Godavari and Cauvery basins. Several of these drill holes are located in the producing oil®elds in these basins. The purpose of the study was to investigate the relationships between the properties of the rocks including dry density, effective porosity, uniaxial compressive strength, tensile strength and Young's modulus. Their relationships are further elucidated using regression analyses. The results indicated that the petrophysical and geomechanical properties vary widely for the different sedimentary rocks and basement samples related to their depth and geological age. It is emphasized that the work should be further extended to assess its full potential in reservoir studies of the oil®elds in these basins.

Coupled Geomechanical‐Flow Assessment of CO2 Leakage through Heterogeneous Caprock during CCS

“…To analyse the petrophysical and geomechanical properties, sedimentary rocks were studied using samples cored from several wells from the Krishna-Godavari basin on the east coast of India [23]. Figure 2 shows best fit linear curves for uniaxial compressive strength, effective porosity, and Young's modulus (E) of core samples.…”

Controls of grain-size distribution on geomechanical properties of reservoir rock—A case study: Cretaceous Khafji Member, Zuluf Field, offshore Arabian Gulf

“…A number of authors including Bell (1978), Fahy and Guccione (1979), Ghafoori et al (1993), Ulusay et al (1994), Shakoor and Brown (1996), Topal and Doyuran (1997), Bell et al (1999), Chatterjee and Mukhopadhyay (2001), and Jeng et al (2004) have discussed the relationships between sedimentological attributes grain size, petrographical characteristics, etc. with the geomechanical properties of reservoir rocks.…”

A stochastic predictive model for Class II rocks post peak modulus

“…The use of Brazilian tensile strength, pre-failure stress-strain parameters, mineralogical properties, and ultra-sonic velocity of rocks to estimate post peak modulus is informed from the fact that post peak modulus may be a function of wide range of parameters of rocks. Pre-failure parameters such as UCS and elastic modulus have been generally estimated from measurable properties such as mineralogy, ultra-sonic velocity, point load index, Brazilian tensile strength, punch block test, porosity etc [9,10,11,12,13] and have shown to be reliable with high level of confidence. This approach of estimation from measurable physical quantities has not been applied to post peak modulus to the best knowledge of the author.…”