# Best Oil and Gas Simulation and Modeling Software for Small Business *By [Neya Kumaresan](https://research.g2.com/insights/author/neya-kumaresan)* Products classified in the overall Oil and Gas Simulation and Modeling category are similar in many regards and help companies of all sizes solve their business problems. However, small business features, pricing, setup, and installation differ from businesses of other sizes, which is why we match buyers to the right Small Business Oil and Gas Simulation and Modeling to fit their needs. Compare product ratings based on reviews from enterprise users or connect with one of G2's buying advisors to find the right solutions within the Small Business Oil and Gas Simulation and Modeling category. In addition to qualifying for inclusion in the Oil and Gas Simulation and Modeling Software category, to qualify for inclusion in the Small Business Oil and Gas Simulation and Modeling Software category, a product must have at least 10 reviews left by a reviewer from a small business. ## G2 Grid® for Oil and Gas Simulation and Modeling Software ![G2 Grid® for Oil and Gas Simulation and Modeling Software plotting products by satisfaction and market presence](https://www.g2.com/categories/oil-and-gas-simulation-and-modeling/grids.png?focus%5B%5D=57710&focus%5B%5D=109729&focus%5B%5D=12899&focus%5B%5D=13036) Highlighted products: Octave Aspect Pipe Stress (CAESAR II), Aspen HYSYS, Surfer, and gPROMS. Underlying data: [Grid® JSON](https://www.g2.com/categories/oil-and-gas-simulation-and-modeling/grids.json?focus%5B%5D=octave-aspect-pipe-stress-caesar-ii&focus%5B%5D=aspen-hysys&focus%5B%5D=surfer&focus%5B%5D=gproms&segment=small-business) ## How Many Oil and Gas Simulation and Modeling Software Products Does G2 Track? **Total Products under this Category:** 133 ### Category Stats (Jul 2026) - **Average Rating**: 4.14/5 The average rating of products in this category, based on all submitted ratings *Last updated: July 21, 2026* ## How Does G2 Rank Oil and Gas Simulation and Modeling Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 300+ Authentic Reviews - 133+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## What Are the Top-Rated Oil and Gas Simulation and Modeling Software Products in 2026? ### 1. [Octave Aspect Pipe Stress (CAESAR II)](https://www.g2.com/products/octave-aspect-pipe-stress-caesar-ii/reviews) Aspect Pipe Stress (formerly CAESAR II) is Octave’s industry-leading, complete solution for pipe stress analysis. Aspect Pipe Stress lets engineers improve piping designs, while the data it provides benefits all aspects of your operation. Whether it’s static or dynamic analysis, Aspect Pipe Stress is robust and gives engineers ways to have confidence in their designs while reducing modeling time with access to the latest codes and standards such as ASME, EN and more. Octave Aspect Pipe Stress also abides by nuclear industry standards, complying with ASME NQA-1 quality assurance. Aspect Pipe Stress enables easy interoperability with other industry-leading tools engineers use such as Forte 3DWorx (formerly CADWorx), Aspect Pressure Vessel (formerly PV Elite), Forte 3D (formerly Smart 3D) and more. Its integration with Hexagon’s structural analysis tool, Aspect Structure (formerly GT STRUDL), even allows the sharing of load details post-analysis so pipe stress analysis and structural groups can work together without duplicating effort. For organizations of any size seeking ways for their piping engineers to be more efficient while having access to the latest technologies in the analysis space, Aspect Pipe Stress is the only suitable solution. **Average Rating:** 4.4/5.0 **Total Reviews:** 30 **How Do G2 Users Rate Octave Aspect Pipe Stress (CAESAR II)?** - **Ease of Use:** 8.7/10 (Category avg: 8.3/10) **Who Is the Company Behind Octave Aspect Pipe Stress (CAESAR II)?** - **Seller:** [Octave](https://www.g2.com/sellers/octave-9e5a428c-f303-4735-9417-dff1ef5736d4) - **Company Website:** https://www.octave.com/ - **HQ Location:** Madison, US - **LinkedIn® Page:** https://www.linkedin.com/company/octaveintelligence/ (3,001 employees on LinkedIn®) **Who Uses This Product?** - **Top Industries:** Oil & Energy, Mechanical or Industrial Engineering - **Company Size:** 38% Small-Business, 38% Mid-Market #### What Are Octave Aspect Pipe Stress (CAESAR II)'s Pros and Cons? **Pros:** - Ease of Use (2 reviews) - Intuitive (1 reviews) - Tools (1 reviews) - Understanding (1 reviews) - User Interface (1 reviews) **Cons:** - Complex Usability (1 reviews) - Expensive (1 reviews) ### What Do G2 Reviewers Say About Octave Aspect Pipe Stress (CAESAR II)? *AI-generated summary from verified user reviews* **Pros:** - Users appreciate the **ease of use** of Octave Aspect Pipe Stress, enjoying its simple interface and quick modeling process. - Users appreciate the **intuitive interface** of Octave Aspect Pipe Stress, making modeling and output straightforward and efficient. - Users value the **easy pipe routing** in Octave Aspect Pipe Stress, which streamlines modeling with efficient import/export options. - Users appreciate the **simple and easy-to-understand interface** of Octave Aspect Pipe Stress for effective modeling. - Users value the **simple and intuitive interface** of Octave Aspect Pipe Stress, enhancing their modeling experience. **Cons:** - Users face issues with **limited file access** , as only one file can be opened per license on the system. - Users find the software **too expensive** compared to other stress analysis packages, limiting its accessibility. #### What Are Recent G2 Reviews of Octave Aspect Pipe Stress (CAESAR II)? **"[Reliability and Power for Pipe Analysis](https://www.g2.com/survey_responses/octave-aspect-pipe-stress-caesar-ii-review-13000248)"** **Rating:** 4.0/5.0 stars *— Ismāīl L.* [Read full review](https://www.g2.com/survey_responses/octave-aspect-pipe-stress-caesar-ii-review-13000248) --- **"[Solid, reliable and modern UI](https://www.g2.com/survey_responses/octave-aspect-pipe-stress-caesar-ii-review-13123063)"** **Rating:** 4.0/5.0 stars *— Rachna M.* [Read full review](https://www.g2.com/survey_responses/octave-aspect-pipe-stress-caesar-ii-review-13123063) --- #### What Are G2 Users Discussing About Octave Aspect Pipe Stress (CAESAR II)? - [What is Caesar model?](https://www.g2.com/discussions/what-is-caesar-model) - [What is the cost of Caesar II?](https://www.g2.com/discussions/what-is-the-cost-of-caesar-ii) - 2 comments - [What is the latest version of Caesar II?](https://www.g2.com/discussions/what-is-the-latest-version-of-caesar-ii) - [What is Caesar II software?](https://www.g2.com/discussions/what-is-caesar-ii-software) ### 2. [Aspen HYSYS](https://www.g2.com/products/aspen-hysys/reviews) Maximize safety, throughput and profits by optimizing the entire site in one environment using industry-validated simulation accuracy and time-saving workflows. **Average Rating:** 4.5/5.0 **Total Reviews:** 38 **How Do G2 Users Rate Aspen HYSYS?** - **Ease of Use:** 8.5/10 (Category avg: 8.3/10) **Who Is the Company Behind Aspen HYSYS?** - **Seller:** [Aspen Technology](https://www.g2.com/sellers/aspen-technology) - **Year Founded:** 1981 - **HQ Location:** Bedford, MA - **Twitter:** @AspenTech (4,751 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/4446/ (4,072 employees on LinkedIn®) - **Ownership:** NASDAQ: AZPN **Who Uses This Product?** - **Top Industries:** Chemicals, Oil & Energy - **Company Size:** 49% Mid-Market, 27% Enterprise #### What Are Recent G2 Reviews of Aspen HYSYS? **"[Great experience](https://www.g2.com/survey_responses/aspen-hysys-review-6796235)"** **Rating:** 5.0/5.0 stars *— Mohit R.* [Read full review](https://www.g2.com/survey_responses/aspen-hysys-review-6796235) --- **"[Best Chemical Simulator for process](https://www.g2.com/survey_responses/aspen-hysys-review-5110731)"** **Rating:** 4.5/5.0 stars *— Mehulkumar S.* [Read full review](https://www.g2.com/survey_responses/aspen-hysys-review-5110731) --- #### What Are G2 Users Discussing About Aspen HYSYS? - [What is Aspen HYSYS used for?](https://www.g2.com/discussions/what-is-aspen-hysys-used-for) - [How do I learn Aspen Hysys?](https://www.g2.com/discussions/how-do-i-learn-aspen-hysys) - [How much does Aspen Hysys cost?](https://www.g2.com/discussions/how-much-does-aspen-hysys-cost) - [Which is better Aspen Hysys vs Aspen Plus?](https://www.g2.com/discussions/which-is-better-aspen-hysys-vs-aspen-plus) - [What is Aspen Hysys for?](https://www.g2.com/discussions/what-is-aspen-hysys-for) ### 3. [Surfer](https://www.g2.com/products/surfer/reviews) Surfer® is a full-function 2D and 3D mapping, modeling, and analysis software package for scientists and engineers. Surfer's sophisticated interpolation engine quickly transforms XYZ and XYZC data into publication-quality maps. Virtually every aspect of the map is customizable. Enhance maps with profiles, legends, titles and labels, faults and breaklines, or external maps from any web mapping service. Surfer is used extensively by geologists, geophysicists, hydrologists, archaeologists, oceanographers, biologists, consultants, engineers, and many others across the globe. **Average Rating:** 4.6/5.0 **Total Reviews:** 124 **How Do G2 Users Rate Surfer?** - **Ease of Use:** 8.7/10 (Category avg: 8.3/10) **Who Is the Company Behind Surfer?** - **Seller:** [Golden Software](https://www.g2.com/sellers/golden-software-617368ba-9788-4952-a993-5ff6ea2becfd) - **Year Founded:** 1983 - **HQ Location:** Golden, CO - **Twitter:** @GoldenSoftware1 (780 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/2011794/ (35 employees on LinkedIn®) **Who Uses This Product?** - **Top Industries:** Environmental Services, Oil & Energy - **Company Size:** 53% Small-Business, 26% Mid-Market #### What Are Recent G2 Reviews of Surfer? **"[Best experience](https://www.g2.com/survey_responses/surfer-review-5364952)"** **Rating:** 5.0/5.0 stars *— John P.* [Read full review](https://www.g2.com/survey_responses/surfer-review-5364952) --- **"[Most powerful data visualization software a researcher and an engineer may ever need](https://www.g2.com/survey_responses/surfer-review-5084170)"** **Rating:** 5.0/5.0 stars *— Igor Y.* [Read full review](https://www.g2.com/survey_responses/surfer-review-5084170) --- #### What Are G2 Users Discussing About Surfer? - [How do I install Surf software?](https://www.g2.com/discussions/how-do-i-install-surf-software) - [Which software is used to prepare 2d or 3d grids and contour maps?](https://www.g2.com/discussions/which-software-is-used-to-prepare-2d-or-3d-grids-and-contour-maps) - [What is surfer program?](https://www.g2.com/discussions/what-is-surfer-program) - [What is Surfer software used for?](https://www.g2.com/discussions/what-is-surfer-software-used-for) ### 4. [gPROMS](https://www.g2.com/products/gproms/reviews) gPROMS has support for multiscale modeling, custom modeling, a full process flowsheet and many more benefits. **Average Rating:** 4.3/5.0 **Total Reviews:** 23 **How Do G2 Users Rate gPROMS?** - **Ease of Use:** 7.6/10 (Category avg: 8.3/10) **Who Is the Company Behind gPROMS?** - **Seller:** [Process System Enterprise](https://www.g2.com/sellers/process-system-enterprise) - **Year Founded:** 1997 - **HQ Location:** Hammersmith, London - **Twitter:** @psenterprise (309 Twitter followers) - **LinkedIn® Page:** https://www.linkedin.com/company/60649/ (49 employees on LinkedIn®) **Who Uses This Product?** - **Top Industries:** Chemicals, Research - **Company Size:** 44% Small-Business, 28% Enterprise #### What Are Recent G2 Reviews of gPROMS? **"[Easy to model](https://www.g2.com/survey_responses/gproms-review-4517803)"** **Rating:** 4.0/5.0 stars *— Hammad A.* [Read full review](https://www.g2.com/survey_responses/gproms-review-4517803) --- **"[gPROMS:The best tool for Advanced process modelling](https://www.g2.com/survey_responses/gproms-review-4547242)"** **Rating:** 5.0/5.0 stars *— Lefteris C.* [Read full review](https://www.g2.com/survey_responses/gproms-review-4547242) --- ## What Is Oil and Gas Simulation and Modeling Software? [Oil and Gas Software](https://www.g2.com/categories/oil-and-gas)