Tag Archive for: technology

Success through more efficient use of technology – DEA at EAGE 2016 in Vienna

From 30 May to 02 June, DEA is presenting recent projects and technology highlights at Europe’s most important technology event of the oil and gas industry, the 78th EAGE Conference and Exhibition.

“In exploration and production of oil and gas, sustained quest for technical solutions and the constant search for efficiency-enhancing concepts are daily business”, says Manfred Böckmann, Senior Vice President Exploration DEA Deutsche Erdoel AG.

These measures are a prerequisite for a continuing assurance of our high safety and environmental standards on the one hand and the economic viability of the projects on the other. In times of low oil prices, this is becoming increasingly important and the EAGE offers an ideal platform for the essential exchange of ideas and the discussion of new approaches, together with the experts of other E&P companies, the service industry and the representatives of science”, Böckmann adds.

At DEA’s booth (Stand No. 2230, Hall B), the visitors can experience live presentations of case studies from international DEA projects and are invited to discuss current industry topics with the DEA experts during the coming days.

DEA Deutsche Erdoel AG is an international operator in the field of exploration and production of crude oil and natural gas based in Hamburg. Its focus is on safe, sustainable and environmental conscious exploitation of oil and gas. DEA has 117 years of experience working along the whole upstream value chain as operator or project partner. With a staff force of 1,400 employees DEA has shares in production facilities and concessions in, among others, Germany, Norway, Denmark, Egypt and Algeria. Moreover, in Germany, DEA also operates large subsurface storage facilities for natural gas.

Copyright: Your Oil and Gas News

Environmental engineers develop method to ID cause of sour hydrocarbons in wells

Rice University researchers have developed a technique to model oil and gas formations to determine the cause of souring. Credit: Jason Gaspar/Alvarez Lab

In at least one—and probably many—oil and gas drilling operations, the use of biocides to prevent the souring of hydrocarbons wastes money and creates an unnecessary environmental burden, according to researchers at Rice University.

The Rice lab of environmental engineer Pedro Alvarez reported that soured hydrocarbons found in the Bakken Formation underneath the Northwest United States and Canada are caused by primarily geochemical reactions rather than microbial ones; the researchers questioned the need to pump costly biocides into the well to kill sulfide-producing microbes.

The team’s finding offers a way to cut costs at wellheads where biocides may be unnecessary while keeping them out of the environment, where they may promote the development of biocide-resistant bacteria, Alvarez said.

The research appears in the American Chemical Society journal Environment Science and Technology Letters.

Soured hydrocarbons are those with high concentrations of hydrogen sulfide gas. The hydrogen sulfide gives oil and natural gas the smell of rotten eggs, can be toxic to breathe and is highly corrosive. For this reason, the gas has to be removed from crude oil before it can be transported or refined.

Curtailing the use of biocides when the source of souring is not from microbes would reduce operation costs and mitigate potential impacts to microbial ecosystems, Alvarez said.

The Rice-led team set out to solve a long-standing puzzle over what in an individual formation makes hydrocarbons go sour. Either microbial life or the geochemical environment can catalyze the reaction, but engineers are rarely able to determine which is happening.

Alvarez and his co-authors developed an improved map of temperatures to about 2 miles below the surface in eight representative Bakken Formation fracture wells. They showed that downhole temperatures in the formation are equal to or exceed the upper known temperature limit—252 degrees Fahrenheit—for microorganisms’ survival.

The team also analyzed isotopes of sulfur isolated from hydrogen sulfide taken from the wells. They found all of the isotopes tested suggested geochemical origins. Water samples from the same wells failed to yield DNA concentrations that would indicate the presence of microorganisms.

“The combination of temperature, sulfur isotope and microbial analyses makes scientific, environmental and financial sense,” said Jason Gaspar, a Rice graduate student and lead author of the paper. “Using our method, we could characterize hydrogen sulfide for dozens of wells in a given shale play for less than the cost of adding biocide to one well alone.”

More information: Jason Gaspar et al. Biogenic versus Thermogenic H S Source Determination in Bakken Wells: Considerations for Biocide Application , Environmental Science & Technology Letters (2016). DOI: 10.1021/acs.estlett.6b00075

Copyrigth: Phys  Org.