I retired from Schlumberger after forty years of service. As a Reservoir Chart Analyst, I was responsible for digitizing pressure charts from drillstem tests first in Lafayette, LA, for the Gulf Coast area, and then for the Rocky Mountains, California and Alaska. Reviewing job timetable and correlating to pressure charts. Calculating liquid or gas recovery from drillstem tests, and calculating flowrate of oil, gas, or total liquid during drill stem tests.
I was promoted to Senior Marketing Geo Scientist in 1991 and I moved to the Denver area. My duties there were interpreting pressure transient tests, such as from open hole or cased hole completions using drillstem testing, lowering electronic gauges into the wellbore and either hanging off the gauges, or suspending at well depth, or pumping well buildup tests, utilizing measurements of casing head pressure, depth to fluid level sonde, and combining the two to convert to bottomhole pressure for the pumped well buildup. Also the interpretation of multiple well interference tests, to determine first, if connectivity exists between wells in the reservoir, and if so, the directional permeability and directional storativity between the wells.
In 2008 I became the Principal Pressure Transient Geoscientist in Schlumberger’s Petro-Technical Services office in Denver, CO – providing consulting services on designing, conducting, and interpreting pressure transient tests in oil and gas reservoirs. I retired in that capacity in 2013.
Today, I continue to work with clients that need annual testing of their disposal wells for reporting to the EPA, interpreting their annual pressure fall-off test data and providing a formal report, as well as working with oil and gas clients on new or producing wells to determine capacity, permeability, skin, pressure, boundary conditions, connectivity to other wells, etc.