March 17, 2009


Description

New laboratory techniques and associated testing equipment were developed to measure the following shale properties on one or two rotary sidewall samples:

Desorption isotherms, lost and residual gas measurements

Tight rock analysis

Sorption Isotherms

Micro fracture porosity and permeability at confining stress

Dynamic rock mechanics

Geochemistry (TOC, rock evaluation)

X-ray diffraction, SEM, Thin section description

Acid solubility

Capillary suction time (CST) and completion fluid optimization

Mercury Injection Capillary pressure and pore size distribution


Unlike coal, shale does not have a natural fracture system (cleat). The small grain size of the shale (mud and clay range) will generate very small matrix permeability (nano Darcy). This very low matrix permeability, combined with the fast recovery offered by the rotary sidewall coring tool, makes these samples good candidates for collecting quality desorption data.

The small sample size makes it possible to get desorption much faster. A six month’s full diameter desorption project can be performed in days with sidewall samples. A fast desorption prevents the errors associated with hydrogen generation by anaerobic bacterial growth in the full diameter desorption canisters.

After analyzing a large number of wells, it was found that the total gas content in shale is variable:

For this reason the averaging technique currently used, where 10-20 sidewall samples from various depths are sealed inside the same desorption canister, can turn an excellent prospect into a mediocre one.

The technology can accurately find the “sweet gas zone” before horizontal drilling begins. This technique is cost effective and provides major savings when compared with the cost of a full diameter core project.

 

Featured Speakers

Speaker Mihai A. Vasilache
President Special Core Analysis Laboratories Mihai Vasilache is the President of Special Core Analysis Laboratories (SCAL, Inc.) in Midland, which he founded in 1989.  Since then the company has grown from a small startup into the premier core analysis laboratory located in the Permian Basin. Mihai is a member of the …

President
Special Core Analysis Laboratories

Mihai Vasilache is the President of Special Core Analysis Laboratories (SCAL, Inc.) in Midland, which he founded in 1989.  Since then the company has grown from a small startup into the premier core analysis laboratory located in the Permian Basin.


Mihai is a member of the SPE 25-year club.  Prior to founding SCAL, Inc., he was an assistant professor of Petroleum Engineering at Texas Tech University, and before that he worked for other companies that performed petrophysical analysis. He is a native of Ploiesti, Romania and has an MS degree in Petroleum Engineering from the Institute of Oil and Gas in Romania.

Full Description



Organizer

Steve McCants


Date and Time

Tue, March 17, 2009

11:30 a.m. - 1 p.m.
(GMT-0500) US/Central

Event has ended

Location

Westlake Club

570 Westlake Park Blvd.
Houston, TX 77079