Houston-based energy company Carrizo Oil & Gas has said that the company has drilled and cased three Eagle Ford Shale horizontal wells located in central La Salle County, Texas, and is currently drilling the horizontal leg in a fourth.

Following the completion of drilling and casing activities on this well, the drilling rig will be moved to a location in close proximity to the El Paso Hixon #1 to spud a fifth well.

The first three wells are being prepared for hydraulic fracture stimulation, which is expected to begin in the third week of October and the fourth and fifth wells are expected to be stimulated and completed in succession following the completion of the first three.

In the Niobrara, a well pad has been prepared on Carrizo’s leasehold in northern Weld County, Colorado, a rig has been contracted, and the company’s first Niobrara horizontal well is expected to spud in the first or second week of October that will be fractured and completed following the drilling.

The company expects to conduct a production test during the fourth quarter of this year.

The company has committed to participate in a 300sq mile 3-D seismic acquisition program over its Niobrara acreage in conjunction with industry partners.

In the Marcellus Shale, the company has contracted a Nabors Drilling rig to initiate development drilling in northern Pennsylvania.

The rig is expected to commence drilling on a multi-well pad located in Forest Lake Township, Susquehanna County, Pennsylvania in late October 2010.

In the Barnett Shale, the 22-well drilling pad is flowing at a rate of 62mmcfe/day which is slated to rise to about 112mmcfe/day following the resolution of pipeline constrictions and the completion of final wells.