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iResGeo has considerable experience in the integrated 4D feasibility studies through integration of petrophysics, reservoir engineering and geophysical expertise. In this series of articles we go through key elements of best practices for 4D feasibility studies. 4D feasibility studies determine the scope of application of the 4D technology in development of the field under study. The decisions that are made in this stage could have long term impact on future management of the field. Questions to be considered in 4D feasibility include: – Assessing the detectability of the expected 4D signal from production induced changes in the reservoir over time. – How frequent should we use seismic monitoring? – How repeatable the surveys should be, suggestions for survey design? – Can the existing seismic surveys serve as the baseline? – What is the added value of the 4D technology? 4D feasibility Why shoot 4D on this reservoir? If 4D seismic technology has not been implemented ...

Chevron posted total earnings of US$415 million for Q4 2016, however, posted a loss for full-year 2016 that the US supermajor says were due to the low oil prices. Chevron’s Q4 2016 earnings reflected a gain, when compared to Q4 2015’s loss of $588 million. For full-year 2016, the company reported a loss of $497 million, compared 2015’s earnings of $4.6 billion. The company's Q4 2016 revenue came in at $31.5 billion, compared to 2015’s $29 million. Its full-year 2016 suffered a 17% decline, going from $138 billion in 2015, to $114 billion in 2016. “Our 2016 earnings reflect the low oil and gas prices we saw during the year,” Chevron Chairman and CEO John Watson says. “We responded aggressively to those conditions, cutting capital and operating expenses by $14 billion. We are well positioned to improve earnings and be cash flow balanced in 2017 through continued tight spending and cost control and additional revenue from expected production growth. That confidence enabled us to i...