OKLAHOMA CITY (AP) —
Chesapeake Energy Corp.
plans to acquire Houston-based
WildHorse Research Development Corp.
in a nearly $4 billion deal.

The agreement
was announced Tuesday
by Oklahoma City-based Chesapeake and WildHorse, an oil and gas company operating in the Eagle Ford Shale and Austin Chalk formations in Texas.

The boards of both companies have approved the sale.

Chesapeake officials say the acquisition expands the company’s oil growth platform.