Who Are We?

Gemini Solutions is first and foremost a company for engineers run by engineers. Our core intellectual property is a 3 Phase finite difference black oil reservoir simulation engine and pre/post processor interface developed and widely used inside Texaco before the developers were allowed to license the software to general industry beginning in early 1997.
Since then our company has expanded to over 100 domestic and international clients small and large while sticking to our core philosophy that simulators should be easy to use. As you evaluate the software we hope our carefully designed workflows make your job more fun and productive as you use simulation results to make crucial reservoir development decisions.


Our team has over 100 years of combined reservoir simulation experience and has successfully evaluated over 1000 reservoirs in diverse projects ranging from large offshore reservoirs to gas storage and unconventionals.

Dr. James L. Buchwalter PhD PE

CEO - Founder

Jim is the Jim in "Gem" in I solutions.

Since maintaining the original engine on the Texaco mainframe over 30 years ago, Jim has studied every reservoir imaginable in his lengthy career and continues to innovate by developing new workflows and software enhancements as well as providing expertise to any client in need of a solution to the most difficult reservoir engineering problems.

Dr. Stephen Lipp PhD PE

Senior Algorithmic Developer

Stephen is tasked with the unique challenge of maintaining and enhancing the simulation engine.

Scaling reservoir equations to solve ever more complex models means the engine must constantly adapt and improve with all users gaining the speed, reliability, and new feature benefits of his work.

Taylor Seal

Petroleum Engineer; Support

Taylor is the newest member of the Gemini Solutions team. Leaving behind the brisk climate of Colorado where he studied PE at the Colorado School of Mines as well as being the 3rd generation to attend.

He is tasked with the opportunity to not only be a reservoir engineer but contribute in all aspects of Gemini, marketing, training, support you name it.

Vaibhav Rajput PhD

Petroleum Engineer; Development

Vaibhav has been with Gemini for over a year.

His primary responsibility is to maintain and update .NET products, with current emphasis on Merlin PVT and WCD workflow.

Vernon Dotson

Software Architect

There are very few things Vern does not know about programming and software engineering.

With numerous patents to his name and 30 plus years of software experience, Vernon is ready to turn client needs into code realities.

Betty Buchwalter

Contracts & Accounting

Betty handles all of the money and thus is very important.

When she's not negotiating contracts or balancing the books you can usually find her at the nearest swim meet cheering on their 3 wonderful children.

Steve M Hodges PE

VP Consulting Services

Steve has been Gemini's primary consultant for over 15 years.

To date Steve's work has saved and made clients hundreds of millions of dollars by using insights gained from expertly constructed history matched simulation models.

Mauricio Ariza

Consulting Engineer

Mauricio is Gemini's sales and support ambassador to Latin speaking nations in central and south America.

He is a professional reservoir engineer with decades of simulation experience working for Large E&P companies in the Americas.

Rahul Patil

Sr. Software Programmer

Rahul is an outstanding programmer and is very important to our team.

He has been with our team for ten years. His contributions to the new development are too numerous to list here .